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                     PREFERRED SECURITIES GUARANTEE AGREEMENT



                                      BETWEEN



                               THE TITAN CORPORATION



                                        AND



                              WILMINGTON TRUST COMPANY

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          THIS PREFERRED SECURITIES GUARANTEE AGREEMENT, dated as of February 9,
2000, executed and delivered by The Titan Corporation, a Delaware corporation
(the "Guarantor"), and Wilmington Trust Company, a Delaware banking corporation,
as trustee (the "Guarantee Trustee"), for the benefit of the Holders (as defined
herein) from time to time of the HIGH TIDES (as defined herein) of Titan Capital
Trust, a  Delaware statutory business trust (the "Trust").

          WHEREAS pursuant to an Amended and Restated Declaration of Trust (the
"Declaration"), dated as of February 9, 2000, executed by the Guarantor, as
Depositor, Wilmington Trust Company, as Delaware Trustee, Wilmington Trust
Company, as Property Trustee, and the Administrative Trustees named therein, the
Trust is issuing $200 million ($250 million including the over-allotment option)
aggregate liquidation amount of its 5 3/4% Convertible Preferred Securities,
Remarketable Term Income Deferred Equity Securities (HIGH TIDES)K, liquidation
amount $50 per security (the "HIGH TIDES") and $6,185,600 ($7,732,000 including
the over-allotment option) aggregate liquidation amount of its Common
Securities, liquidation amount $50 per security (the "Common Securities" and
collectively with the HIGH TIDES, the "Trust Securities") representing undivided
beneficial interests in the assets of the Trust and having the terms set forth
in the Declaration;

          WHEREAS the Trust Securities will be issued by the Trust and the
proceeds thereof will be used to purchase the Convertible Senior Subordinated
Debentures Due 2030 (the "Debentures") of the Guarantor which will be deposited
with Wilmington Trust Company as Property Trustee under the Declaration, as
trust assets; and

          WHEREAS as incentive for the Holders to purchase HIGH TIDES, the
Guarantor desires irrevocably and unconditionally to agree, to the extent set
forth herein, to pay to the Holders of the HIGH TIDES the Guarantee Payments (as
defined herein) and to make certain other payments on the terms and conditions
set forth herein.

          NOW, THEREFORE, in consideration of the purchase by each Holder of
HIGH TIDES, which purchase the Guarantor hereby agrees shall benefit the
Guarantor, the Guarantor executes and delivers this Guarantee Agreement for the
benefit of the Holders from time to time of the HIGH TIDES.


                                    ARTICLE I

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                                   DEFINITIONS

          SECTION 1.01.  DEFINITIONS.  As used in this Guarantee Agreement, the
terms set forth below shall, unless the context otherwise requires, have the
following meanings.  Capitalized or otherwise defined terms used but not
otherwise defined herein shall have the meanings assigned to such terms in the
Declaration as in effect on the date hereof.

          "Affiliate" of any specified Person means any other Person directly or
indirectly controlling or controlled by or under direct or indirect common
control with such specified Person; PROVIDED, HOWEVER, that the Trust shall be
deemed not to be an Affiliate of the Guarantor.  For the purposes of this
definition, "control" when used with respect to any specified Person means the
power to direct the management and policies of such Person, directly or
indirectly, whether through the ownership of voting securities, by contract or
otherwise; the terms "controlling" and "controlled" have meanings correlative to
the foregoing.

          "Common Securities" shall have the meaning specified in the first
recital of this Guarantee Agreement.

          "Credit Agreement" means the Amended and Restated Credit Agreement
dated as of June 9, 1999, among the Guarantor, as the borrower, the various
financial institutions from time to time that are parties thereto, as lenders,
The Bank of Nova Scotia, as lead manager and administrative agent, and Imperial
Bank as the document agent, any credit agreement evidencing the credit
facilities that are substantially described in the commitment letter dated
January 27, 2000, from Credit Suisse First Boston, New York branch, and First
Union National Bank to the Guarantor, and any other secured debt facilities with
banks or other institutional lenders providing for revolving credit loans, term
loans, working capital loans or letters of credit, in each case, including any
related notes, guarantees, collateral documents, swap arrangements, instruments
and agreements entered into in connection therewith, and as such credit
agreements and related documents may be amended, restated, supplemented,
renewed, replaced, refinanced or otherwise modified from time to time whether or
not with the same agent, lender or group of lenders and whether with the same
borrowers or guarantors.

          "Debentures" shall have the meaning specified in the second recital of
this Guarantee Agreement.

          "Debt" means (i) the principal of and premium, if any, and unpaid
interest on indebtedness for money borrowed, (ii) purchase money and similar
obligations, (iii) obligations under capital leases, (iv) guarantees,
assumptions or purchase commitments relating to, or other transactions as a
result of which the Guarantor is responsible for the payment of such
indebtedness of others, (v) renewals, extensions and refunding of any such
indebtedness, (vi) interest or obligations in respect of any such indebtedness
accruing after the commencement of any insolvency or bankruptcy proceedings and
(vii)

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obligations associated with derivative products such as interest rate and
currency exchange contracts, foreign exchange contracts, commodity contracts and
similar arrangements.

          "Declaration" shall have the meaning specified in the first recital to
this Guarantee Agreement.

          "Event of Default" means a default by the Guarantor on any of its
payment or other obligations under this Guarantee Agreement; PROVIDED, HOWEVER,
that, except with respect to a default in payment of any Guarantee Payments, the
Guarantor shall have received notice of default and shall not have cured such
default within 60 days after receipt of such notice.

          "Guarantee Payments" means the following payments or distributions,
without duplication, with respect to the HIGH TIDES, to the extent not paid or
made by or on behalf of the Trust:  (i) any accrued and unpaid Distributions
required to be paid on the HIGH TIDES, to the extent the Trust shall have funds
on hand available therefor at such time, (ii) the applicable Redemption Price,
with respect to the HIGH TIDES called for redemption by the Trust to the extent
the Trust shall have funds on hand available therefor at such time, and (iii)
upon a voluntary or involuntary dissolution, winding-up or liquidation of the
Trust, unless Debentures are distributed to the Holders of the HIGH TIDES or all
the HIGH TIDES are redeemed, the lesser of (a) the aggregate of the liquidation
amount of $50 per HIGH TIDES plus accrued and unpaid Distributions on the HIGH
TIDES to the date of payment (the "Liquidation Distribution") to the extent the
Trust shall have funds on hand available to make such payment at such time and
(b) the amount of assets of the Trust remaining available for distribution to
Holders of the HIGH TIDES upon liquidation of the Trust after satisfaction of
liabilities to creditors of the Trust as required by applicable law.

          "Guarantee Trustee" means Wilmington Trust Company, a Delaware banking
corporation, until a Successor Guarantee Trustee has been appointed and has
accepted such appointment pursuant to the terms of this Guarantee Agreement and
thereafter means each such Successor Guarantee Trustee.

          "Guarantor" shall have the meaning specified in the first paragraph of
this Guarantee Agreement.

          "HIGH TIDES" shall have the meaning specified in the first recital of
this Guarantee Agreement.

          "Holder" means any holder, as registered on the books and records of
the Trust, of any HIGH TIDES; PROVIDED, HOWEVER, that in determining whether the
holders of the requisite percentage of HIGH TIDES have given any request,
notice, consent or waiver hereunder, "Holder" shall not include the Guarantor or
any Affiliate of the Guarantor.

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          "Indenture" means the Indenture dated as of February 9, 2000, as
amended or supplemented, between the Guarantor and Wilmington Trust Company, as
trustee, relating to the issuance of Debentures.

          "Trust" shall have the meaning specified in the first paragraph of
this Guarantee Agreement.

          "List of Holders" has the meaning specified in Section 2.02(a).

          "Majority in liquidation amount of the HIGH TIDES" means, except as
provided in the terms of the HIGH TIDES or by the Trust Indenture Act, a vote by
the Holder(s), voting separately as a class, of more than 50% of the aggregate
liquidation amount (i.e., the stated amount that would be paid on redemption,
liquidation or otherwise, plus accrued and unpaid distributions to the date upon
which the voting percentages are determined) of all then outstanding HIGH TIDES.

          "Officers' Certificate" means, with respect to any Person, a
certificate signed by the chief executive officer, president or a vice
president, and by the treasurer, an associate treasurer, an assistant treasurer,
the secretary or an assistant secretary of such Person, and delivered to the
Guarantee Trustee.  Any Officers' Certificate delivered with respect to
compliance with a condition or covenant provided for in this Guarantee Agreement
shall include:

          (a) a statement that each officer signing the Officers' Certificate
     has read the covenant or condition and the definitions relating thereto;

          (b) a brief statement of the nature and scope of the examination or
     investigation undertaken by each officer in rendering the Officers'
     Certificate;

          (c) a statement that each officer has made such examination or
     investigation as, in such officer's opinion, is necessary to enable such
     officer to express an informed opinion as to whether or not such covenant
     or condition has been complied with; and

          (d) a statement as to whether, in the opinion of each officer, such
     condition or covenant has been complied with.

          "Person" means a legal person, including any individual, corporation,
estate, partnership, joint venture, association, joint stock company, limited
liability company, trust, unincorporated association, or government or any
agency or political subdivision thereof, or any other entity of whatever nature.

          "Responsible Officer" when used with respect to the Guarantee Trustee
means any officer assigned to the Corporate Trust Office, including any vice
president,

<PAGE>

assistant vice president, assistant treasurer, the controller, assistant
secretary or any other officer of the Guarantee Trustee customarily performing
functions similar to those performed by any of the above designated officers,
and having direct responsibility for the administration of this Guarantee
Agreement, and also, with respect to a particular matter, any other officer to
whom such matter is referred because of such officer's knowledge of and
familiarity with the particular subject.

          "Secured Debt" means Debt under the Credit Agreement and any Debt that
by its terms is secured by any lien, pledge, charge, encumbrance, mortgage, deed
of trust, hypothecation, assignment or security interest with respect to assets
having or intended to have an aggregate fair market value at the time of the
grant thereof (in the judgment of the board of directors, the chief financial
officer or other responsible agent or officer of the Guarantor) not less than
the amount of such Debt.

          "Successor Guarantee Trustee" means a successor Guarantee Trustee
possessing the qualifications to act as Guarantee Trustee under Section 4.01.

          "Trust Indenture Act" means the Trust Indenture Act of 1939 (15 U.S.C.
Sections 77aaa-77bbbb), as amended.

          "Trust Securities" shall have the meaning specified in the first
recital of this Guarantee Agreement.


                                   ARTICLE II

                               TRUST INDENTURE ACT

          SECTION 2.01.  TRUST INDENTURE ACT; APPLICATION.  This Guarantee
Agreement is subject to the provisions of the Trust Indenture Act that are
required to be part of this Guarantee Agreement and shall, to the extent
applicable, be governed by such provisions.  If and to the extent that any
provision of this Guarantee Agreement limits, qualifies or conflicts with the
duties imposed by Sections 310 to 317, inclusive, of the Trust Indenture Act,
such imposed duties shall control.

          SECTION 2.02.  LISTS OF HOLDERS OF SECURITIES.  (a)  The Guarantor
shall provide the Guarantee Trustee (i) within 14 days after each record date
for payment of Distributions, a list, in such form as the Guarantee Trustee may
reasonably require, of the names and addresses of the Holders of the HIGH TIDES
("LIST OF HOLDERS") as of such record date, PROVIDED that the Guarantor shall
not be obligated to provide such List of Holders at any time the List of Holders
does not differ from the most recent List of Holders given to the Guarantee
Trustee by the Guarantor on behalf of the Trust, and (ii) at any other time,
within 30 days of receipt by the Trust of a written request for a List of
Holders as of a date no more than 14 days before such List of Holders is given
to the Guarantee Trustee.

<PAGE>

          (b)  The Guarantee Trustee shall comply with its obligations under
Section 311(a), 311(b) and 312(b) of the Trust Indenture Act.

          SECTION 2.03.  REPORTS BY THE GUARANTEE TRUSTEE.  Within 60 days after
May 15 of each year, commencing May 15, 2000, the Guarantee Trustee shall
provide to the Holders of the HIGH TIDES such reports as are required by Section
313 of the Trust Indenture Act, if any, in the form and in the manner provided
by Section 313 of the Trust Indenture Act.  The Guarantee Trustee shall also
comply with the requirements of Section 313(d) of the Trust Indenture Act.

          SECTION 2.04.  PERIODIC REPORTS TO THE GUARANTEE TRUSTEE.  The
Guarantor shall provide to the Guarantee Trustee such documents, reports and
information as required by Section 314 of the Trust Indenture Act (if any) and
the compliance certificate required by Section 314 of the Trust Indenture Act in
the form, in the manner and at the times required by Section 314 of the Trust
Indenture Act.

          SECTION 2.05.  EVIDENCE OF COMPLIANCE WITH CONDITIONS PRECEDENT.  The
Guarantor shall provide to the Guarantee Trustee such evidence of compliance
with such conditions precedent, if any, provided for in this Guarantee Agreement
that relate to any of the matters set forth in Section 314(c) of the Trust
Indenture Act.  Any certificate or opinion required to be given by any officer
pursuant to Section 314(c)(1) may be given in the form of an Officers'
Certificate.

          SECTION 2.06.  EVENTS OF DEFAULT; WAIVER.  The Holders of a Majority
in liquidation amount of the HIGH TIDES may, by vote, on behalf of all the
Holders, waive any past Event of Default and its consequences.  Upon such
waiver, any such Event of Default shall cease to exist, and any Event of Default
arising therefrom shall be deemed to have been cured, for every purpose of this
Guarantee Agreement, but no such waiver shall extend to any subsequent or other
default or Event of Default or impair any right consequent therefrom.

          SECTION 2.07.  EVENT OF DEFAULT; NOTICE.  (a)  The Guarantee Trustee
shall, within 10 days after the occurrence of an Event of Default, transmit by
mail, first class postage prepaid, to the Holders, notices of all Events of
Default known to the Guarantee Trustee, unless such Events of Default have been
cured before the giving of such notice; PROVIDED, that, except in the case of a
default in the payment of a Guarantee Payment, the Guarantee Trustee shall be
protected in withholding such notice if and so long as the board of directors,
the executive committee or a trust committee of directors and/or Responsible
Officers of the Guarantee Trustee in good faith determine that the withholding
of such notice is in the interests of the Holders.

          (b)  The Guarantee Trustee shall not be deemed to have knowledge of
any Event of Default unless the Guarantee Trustee shall have received written
notice thereof,

<PAGE>

or a Responsible Officer of the Guarantee Trustee charged with the
administration of this Guarantee Agreement shall have obtained actual knowledge
thereof.

          SECTION 2.08.  CONFLICTING INTERESTS.  The Declaration shall be deemed
to be specifically described in this Guarantee Agreement for the purposes of
clause (i) of the first proviso contained in Section 310(b) of the Trust
Indenture Act.


                                     ARTICLE III

                           POWERS, DUTIES AND RIGHTS OF THE
                                  GUARANTEE TRUSTEE

          SECTION 3.01.  POWERS AND DUTIES OF THE GUARANTEE TRUSTEE.  (a)  This
Guarantee Agreement shall be held by the Guarantee Trustee for the benefit of
the Holders, and the Guarantee Trustee shall not transfer this Guarantee
Agreement to any Person except a Holder exercising his or her rights pursuant to
Section 5.04(iv) or to a Successor Guarantee Trustee on acceptance by such
Successor Guarantee Trustee of its appointment to act as Successor Guarantee
Trustee.  The right, title and interest of the Guarantee Trustee shall
automatically vest in any Successor Guarantee Trustee, upon acceptance by such
Successor Guarantee Trustee of its appointment hereunder, and such vesting and
cessation of title shall be effective whether or not conveyancing documents have
been executed and delivered pursuant to the appointment of such Successor
Guarantee Trustee.

          (b)  If an Event of Default has occurred and is continuing, the
Guarantee Trustee shall enforce this Guarantee Agreement for the benefit of the
Holders.

          (c)  The Guarantee Trustee, before the occurrence of any Event of
Default and after the curing of all Events of Default that may have occurred,
shall undertake to perform only such duties as are specifically set forth in
this Guarantee Agreement, and no implied covenants shall be read into this
Guarantee Agreement against the Guarantee Trustee.  In case an Event of Default
has occurred (that has not been cured or waived pursuant to Section 2.06), the
Guarantee Trustee shall exercise such of the rights and powers vested in it by
this Guarantee Agreement, and use the same degree of care and skill in its
exercise thereof, as a prudent person would exercise or use under the
circumstances in the conduct of his or her own affairs.

          (d)  No provision of this Guarantee Agreement shall be construed to
relieve the Guarantee Trustee from liability for its own negligent action, its
own negligent failure to act or its own wilful misconduct, except that:

          (i)   prior to the occurrence of any Event of Default and after the
     curing or waiving of all such Events of Default that may have occurred:

<PAGE>

                (A) the duties and obligations of the Guarantee Trustee shall be
          determined solely by the express provisions of this Guarantee
          Agreement, and the Guarantee Trustee shall not be liable except for
          the performance of such duties and obligations as are specifically set
          forth in this Guarantee Agreement; and

                (B) in the absence of bad faith on the part of the Guarantee
          Trustee, the Guarantee Trustee may conclusively rely, as to the truth
          of the statements and the correctness of the opinions expressed
          therein, upon any certificates or opinions furnished to the Guarantee
          Trustee and conforming to the requirements of this Guarantee
          Agreement; but in the case of any such certificates or opinions that
          by any provision hereof or of the Trust Indenture Act are specifically
          required to be furnished to the Guarantee Trustee, the Guarantee
          Trustee shall be under a duty to examine the same to determine whether
          or not they conform to the requirements of this Guarantee Agreement;

          (ii)  the Guarantee Trustee shall not be liable for any error of
     judgment made in good faith by a Responsible Officer of the Guarantee
     Trustee, unless it shall be proved that the Guarantee Trustee was negligent
     in ascertaining the pertinent facts upon which such judgment was made;

          (iii) the Guarantee Trustee shall not be liable with respect to any
     action taken or omitted to be taken by it in good faith in accordance with
     the direction of the Holders of not less than a Majority in liquidation
     amount of the HIGH TIDES relating to the time, method and place of
     conducting any proceeding for any remedy available to the Guarantee
     Trustee, or exercising any trust or power conferred upon the Guarantee
     Trustee under this Guarantee Agreement; and

          (iv)  no provision of this Guarantee Agreement shall require the
     Guarantee Trustee to expend or risk its own funds or otherwise incur
     personal financial liability in the performance of any of its duties or in
     the exercise of any of its rights or powers.

          SECTION 3.02.  CERTAIN RIGHTS OF GUARANTEE TRUSTEE.  (a)  Subject to
the provisions of Section 3.01:

          (i) The Guarantee Trustee may conclusively rely and shall be fully
     protected in acting or refraining from acting upon any resolution,
     certificate, statement, instrument, opinion, report, notice, request,
     direction, consent, order, bond, debenture, note, other evidence of
     indebtedness or other paper or document reasonably believed by it to be
     genuine and to have been signed, sent or presented by the proper party or
     parties.

<PAGE>

          (ii) Any direction or act of the Guarantor contemplated by this
     Guarantee Agreement shall be sufficiently evidenced by an Officers'
     Certificate unless otherwise prescribed herein.

          (iii) Whenever, in the administration of this Guarantee Agreement, the
     Guarantee Trustee shall deem it desirable that a matter relating to
     compliance by the Guarantor with any of its obligations contained in this
     Guarantee Agreement be proved or established before taking, suffering or
     omitting to take any action hereunder, the Guarantee Trustee (unless other
     evidence is herein specifically prescribed) may, in the absence of bad
     faith on its part, request and conclusively rely upon an Officers'
     Certificate (with respect to the Guarantor) which, upon receipt of such
     request from the Guarantee Trustee, shall be promptly delivered by the
     Guarantor.

          (iv) The Guarantee Trustee may consult with legal counsel of its
     selection, and the advice or opinion of such legal counsel with respect to
     legal matters shall be full and complete authorization and protection in
     respect of any action taken, suffered or omitted to be taken by it
     hereunder in good faith and in accordance with such advice or opinion.
     Such legal counsel may be legal counsel to the Guarantor, the Trust or any
     of its Affiliates and may be one of its employees.  The Guarantee Trustee
     shall have the right at any time to seek instructions concerning the
     administration of this Guarantee Agreement from any court of competent
     jurisdiction.

          (v) The Guarantee Trustee shall be under no obligation to exercise any
     of the rights or powers vested in it by this Guarantee Agreement at the
     request or direction of any Holder, unless such Holder shall have provided
     to the Guarantee Trustee such security and indemnity reasonably
     satisfactory to it, against the costs, expenses (including attorneys' fees
     and expenses) and liabilities that might be incurred by it in complying
     with such request or direction, including such reasonable advances as may
     be requested by the Guarantee Trustee; PROVIDED, that nothing contained in
     this Section 3.02(a)(v) shall be taken to relieve the Guarantee Trustee,
     upon the occurrence of an Event of Default, of its obligation to exercise
     the rights and powers vested in it by this Guarantee Agreement.

          (vi) The Guarantee Trustee shall not be bound to make any
     investigation into the facts or matters stated in any resolution,
     certificate, statement, instrument, opinion, report, notice, request,
     direction, consent, order, bond, debenture, note, other evidence of
     indebtedness or other paper or document, but the Guarantee Trustee, in its
     discretion, may make such further inquiry or investigation into such facts
     or matters as it may see fit.

          (vii) The Guarantee Trustee may execute any of the trusts or powers
     hereunder or perform any duties hereunder either directly or by or through
     its agents or attorneys, and the Guarantee Trustee shall not be responsible
     for any

<PAGE>

     misconduct or negligence on the part of any such agent or attorney
     appointed with due care by it hereunder.

          (viii) Whenever in the administration of this Guarantee Agreement the
     Guarantee Trustee shall deem it desirable to receive instructions with
     respect to enforcing any remedy or right or taking any other action
     hereunder, the Guarantee Trustee (A) may request instructions from the
     Holders, (B) may refrain from enforcing such remedy or right or taking such
     other action until such instructions are received and (C) shall be fully
     protected in acting in accordance with such instructions.

          (b)  No provision of this Guarantee Agreement shall be deemed to
impose any duty or obligation on the Guarantee Trustee to perform any act or
acts or exercise any right, power, duty or obligation conferred or imposed on it
in any jurisdiction in which it shall be illegal, or in which the Guarantee
Trustee shall be unqualified or incompetent in accordance with applicable law,
to perform any such act or acts or to exercise any such right, power, duty or
obligation.  No permissive power or authority available to the Guarantee Trustee
shall be construed to be a duty to act in accordance with such power and
authority.

          SECTION 3.03.  INDEMNITY.  The Guarantor agrees to indemnify the
Guarantee Trustee and its directors, officers, agents and employees for, and to
hold them harmless against, any and all loss, liability, claim, action, suit,
cost or expense incurred without negligence or bad faith on the part of the
Guarantee Trustee, arising out of or in connection with the acceptance or
administration of this Guarantee Agreement, including the costs and expenses of
defending itself against any claim or liability in connection with the exercise
or performance of any of its powers or duties hereunder.  The Guarantee Trustee
will not claim or exact any lien or charge on any Guarantee Payments as a result
of any amount due to it under this Guarantee Agreement.  This indemnity shall
survive the termination of this Guarantee Agreement or the resignation or
removal of the Guarantee Trustee.

          SECTION 3.04.  EXPENSES.  The Guarantor shall from time to time
reimburse the Guarantee Trustee for its expenses and costs incurred in
connection with the performance of its duties hereunder.  This reimbursement
obligation shall survive the termination of this Guarantee Agreement or the
resignation or removal of the Guarantee Trustee.

<PAGE>

                                      ARTICLE IV

                                  GUARANTEE TRUSTEE

          SECTION 4.01.  GUARANTEE TRUSTEE; ELIGIBILITY.  (a)  There shall at
all times be a Guarantee Trustee which shall:

          (i) not be an Affiliate of the Guarantor; and

          (ii) be a Person that is eligible pursuant to the Trust Indenture Act
     to act as such and has a combined capital and surplus of at least
     $50,000,000, and shall be a corporation meeting the requirements of Section
     310(c) of the Trust Indenture Act.  If such corporation publishes reports
     of condition at least annually, pursuant to law or to the requirements of
     the supervising or examining authority, then, for the purposes of this
     Section and to the extent permitted by the Trust Indenture Act, the
     combined capital and surplus of such corporation shall be deemed to be its
     combined capital and surplus as set forth in its most recent report of
     condition so published.

          (b)  If at any time the Guarantee Trustee shall cease to be eligible
to so act under Section 4.01(a), the Guarantee Trustee shall immediately resign
in the manner and with the effect set out in Section 4.02(c).

          (c)  If the Guarantee Trustee has or shall acquire any "conflicting
interest" within the meaning of Section 310(b) of the Trust Indenture Act, the
Guarantee Trustee and Guarantor shall in all respects comply with the provisions
of Section 310(b) of the Trust Indenture Act.

          SECTION 4.02.  APPOINTMENT, REMOVAL AND RESIGNATION OF THE GUARANTEE
TRUSTEE.  (a)  Subject to Section 4.02(b), in the absence of the existence of an
Event of Default, the Guarantee Trustee may be appointed or removed without
cause at any time by the Guarantor.

          (b)  The Guarantee Trustee shall not be removed until a Successor
Guarantee Trustee has been appointed and has accepted such appointment by
written instrument executed by such Successor Guarantee Trustee and delivered to
the Guarantor.

          (c)  The Guarantee Trustee appointed hereunder shall hold office until
a Successor Guarantee Trustee shall have been appointed or until its removal or
resignation.  The Guarantee Trustee may resign from office by an instrument in
writing executed by the Guarantee Trustee and delivered to the Guarantor, which
resignation shall not take effect until a Successor Guarantee Trustee has been
appointed and has accepted such appointment by instrument in writing executed by
such Successor Guarantee Trustee and delivered to the Guarantor and the
resigning Guarantee Trustee.

<PAGE>

          (d)  If no Successor Guarantee Trustee shall have been appointed and
accepted appointment as provided in     this Section 4.02 within 30 days after
delivery to the Guarantor of an instrument of resignation or notice of removal
by the Guarantor, the retiring Guarantee Trustee may petition, at the expense of
the Guarantor, any court of competent jurisdiction for appointment of a
Successor Guarantee Trustee.  Such court may thereupon, after prescribing such
notice, if any, as it may deem proper, appoint a Successor Guarantee Trustee.


                                    ARTICLE V

                                    GUARANTEE

          SECTION 5.01.  GUARANTEE.  The Guarantor irrevocably and
unconditionally agrees to pay in full to the Holders the Guarantee Payments
(without duplication of amounts theretofore paid by or on behalf of the Trust),
as and when due, regardless of any defense, right of set-off or counterclaim
which the Trust may have or assert, other than the defense of payment.  The
Guarantor's obligation to make a Guarantee Payment may be satisfied by direct
payment of the required amounts by the Guarantor to the Holders or by causing
the Trust to pay such amounts to the Holders.  The Guarantor shall give written
notice to the Guarantee Trustee as promptly as practicable in the event it makes
any direct payment hereunder.

          SECTION 5.02.  WAIVER OF NOTICE AND DEMAND.  The Guarantor hereby
waives notice of acceptance of the Guarantee Agreement and, with respect to its
obligations under Section 5.01, hereby waives presentment, demand for payment,
any right to require a proceeding first against the Guarantee Trustee, Trust or
any other Person before proceeding against the Guarantor, protest, notice of
nonpayment, notice of dishonor, notice of redemption and all other notices and
demands.

          SECTION 5.03.  OBLIGATIONS NOT AFFECTED.  The obligations, covenants,
agreements and duties of the Guarantor under this Guarantee Agreement shall in
no way be affected or impaired by reason of the happening from time to time of
any of the following:

          (a) the release or waiver, by operation of law or otherwise, of the
     performance or observance by the Trust of any express or implied agreement,
     covenant, term or condition relating to the HIGH TIDES to be performed or
     observed by the Trust;

          (b) the extension of time for the payment by the Trust of all or any
     portion of the Distributions (other than any deferral of time for payment
     of Distributions that results from the deferral of any interest payment
     period on the Debentures as so provided in the Indenture), Redemption
     Price, Liquidation Distribution or any other sums payable under the terms
     of the HIGH TIDES or the extension of time

<PAGE>

     for the performance of any other obligation under, arising out of, or in
     connection with, the HIGH TIDES;

          (c) any failure, omission, delay or lack of diligence on the part of
     the Holders to enforce, assert or exercise any right, privilege, power or
     remedy conferred on the Holders pursuant to the terms of the HIGH TIDES, or
     any action on the part of the Trust granting indulgence or extension of any
     kind;

          (d) the voluntary or involuntary liquidation, dissolution, sale of any
     collateral, receivership, insolvency, bankruptcy, assignment for the
     benefit of creditors, reorganization, arrangement, composition or
     readjustment of debt of, or other similar proceedings affecting, the Trust
     or any of the assets of the Trust;

          (e) any invalidity of, or defect or deficiency in, the HIGH TIDES;

          (f) the settlement or compromise of any obligation guaranteed hereby
     or hereby incurred (without duplication of amounts paid by the Trust in
     connection with any such settlement or compromise); or

          (g) any other circumstance whatsoever that might otherwise constitute
     a legal or equitable discharge or defense of a guarantor, it being the
     intent of this Section 5.03 that the obligations of the Guarantor hereunder
     shall be absolute and unconditional under any and all circumstances.

          There shall be no obligation of the Holders to give notice to, or
obtain the consent of, the Guarantor with respect to the happening of any of the
foregoing.

          SECTION 5.04.  RIGHTS OF HOLDERS.  The Guarantor expressly
acknowledges that:  (i) this Guarantee Agreement will be deposited with the
Guarantee Trustee to be held for the benefit of the Holders; (ii) the Guarantee
Trustee has the right to enforce this Guarantee Agreement on behalf of the
Holders; (iii) the Holders of a Majority in liquidation amount of the HIGH TIDES
have the right among themselves, the other Holders, if any, and the Guarantee
Trustee to direct the time, method and place of conducting any proceeding for
any remedy available to the Guarantee Trustee in respect of this Guarantee
Agreement or exercising any trust or power conferred upon the Guarantee Trustee
under this Guarantee Agreement; and (iv) any Holder may institute a legal
proceeding directly against the Guarantor to enforce its rights under this
Guarantee Agreement, without first instituting a legal proceeding against the
Trust or any other Person.

          SECTION 5.05.  GUARANTEE OF PAYMENT.  This Guarantee Agreement creates
a guarantee of payment and not of collection.  This Guarantee Agreement will not
be discharged except in the event of its termination in accordance with Section
7.01 hereof.

<PAGE>

          SECTION 5.06.  SUBROGATION.  The Guarantor shall be subrogated to all
(if any) rights of the Holders against the Trust in respect of any amounts paid
to the Holders by the Guarantor under this Guarantee Agreement and shall have
the right to waive payment by the Trust pursuant to Section 5.01; PROVIDED,
HOWEVER, that the Guarantor shall not (except to the extent required by
mandatory provisions of law) be entitled to enforce or exercise any rights which
it may acquire by way of subrogation or any indemnity, reimbursement or other
agreement, in all cases as a result of payment under this Guarantee Agreement,
if at the time of any such payment, any amounts are due and unpaid under this
Guarantee Agreement.  If any amount shall be paid to the Guarantor in violation
of the preceding sentence, the Guarantor agrees to hold such amount in trust for
the Holders and to pay over such amount to the Holders.

          SECTION 5.07.  INDEPENDENT OBLIGATIONS.  The Guarantor acknowledges
that its obligations hereunder are independent of the obligations of the Trust
with respect to the HIGH TIDES and that the Guarantor shall (without duplication
of amounts paid by or on behalf of the Trust) be liable as principal and as
debtor hereunder to make Guarantee Payments pursuant to the terms of this
Guarantee Agreement notwithstanding the occurrence of any event referred to in
subsections (a) through (g), inclusive, of Section 5.03 hereof, but subject to
Section 6.01 hereof.


                                   ARTICLE VI

                           COVENANTS AND SUBORDINATION

          SECTION 6.01.  SUBORDINATION.  This Guarantee Agreement will
constitute an unsecured obligation of the Guarantor and will rank subordinate
and junior in right of payment only to all Secured Debt of the Guarantor in
accordance with the terms of Article XII of the Indenture, which terms
(including the definitions of all defined terms used therein) are incorporated
herein, MUTATIS MUTANDIS, by this reference.

          SECTION 6.02.  PARI PASSU GUARANTEES.  This Guarantee Agreement shall
rank PARI PASSU with the most senior preferred or preference stock now or
hereafter issued by the Guarantor and with any guaranty now or hereafter entered
into by the Guarantor in respect of any preferred or preference stock of any
Affiliate of the Guarantor.


                                     ARTICLE VII

                                     TERMINATION

          SECTION 7.01.  TERMINATION.  This Guarantee Agreement shall terminate
and be of no further force and effect upon (i) full payment of the Redemption
Price of all HIGH TIDES, (ii) the distribution of Debentures to the Holders in
exchange for all of the HIGH TIDES, (iii) full payment of the amounts payable in
accordance with the

<PAGE>

Declaration upon liquidation of the Trust or (iv) distribution of the
Guarantor's common stock to the Holders in respect of the conversion of all of
the HIGH TIDES. Notwithstanding the foregoing, this Guarantee Agreement will
continue to be effective or will be reinstated, as the case may be, if at any
time any Holder must repay any sums paid with respect to HIGH TIDES or this
Guarantee Agreement.


                                  ARTICLE VIII

                                  MISCELLANEOUS

          SECTION 8.01.  SUCCESSORS AND ASSIGNS.  All guarantees and agreements
contained in this Guarantee Agreement shall bind the successors, assigns,
receivers, trustees and representatives of the Guarantor and shall inure to the
benefit of the Holders of the HIGH TIDES then outstanding.  Except in connection
with a consolidation, merger or sale involving the Guarantor that is permitted
under Article VIII of the Indenture and pursuant to which the assignee agrees in
writing to perform the Guarantor's obligations hereunder, the Guarantor shall
not assign its obligations hereunder.

          SECTION 8.02.  AMENDMENTS.  Except with respect to any changes which
do not adversely affect the rights of the Holders in any material respect (in
which case no consent of the Holders will be required), this Guarantee Agreement
may only be amended with the prior approval of the Holders of not less than a
Majority in liquidation amount of the HIGH TIDES.  The provisions of Article XII
of the Declaration concerning meetings of the Holders shall apply to the giving
of such approval.

          SECTION 8.03.  NOTICES.  Any notice, request or other communication
required or permitted to be given hereunder shall be in writing, duly signed by
the party giving such notice, and delivered, telecopied (confirmed by delivery
of the original) or mailed by first class mail as follows:

          (a) if given to the Guarantor, to the address set forth below or such
     other address, facsimile number or to the attention of such other Person as
     the Guarantor may give notice to the Holders:

                The Titan Corporation
                3033 Science Park Road
                San Diego, California 92121-1199

                Telephone: (858) 552-9500
                Facsimile No.: (858) 552-9759
                Attention: General Counsel

<PAGE>

          (b) if given to the Trust, in care of the Guarantor, at the Trust's
     (and the Guarantee Trustee's) address set forth below or such other address
     as the Trust may, at the Trust's direction, give notice to the Holders:

                Titan Capital Trust
                c/o The Titan Corporation
                3033 Science Park Road
                San Diego, California 92121-1199

                Telephone: (858) 552-9500
                Facsimile No.: (858) 552-9759
                Attention: General Counsel

                with a copy to:

                Wilmington Trust Company
                Rodney Square North
                1100 North Market Street
                Wilmington, DE 19890-0001
                Facsimile No.: (302) 651-8882
                Attention: Corporate Trust Administration

          (c) if given to the Guarantee Trustee:

                Wilmington Trust Company
                Rodney Square North
                1100 North Market Street
                Wilmington, DE 19890-0001
                Facsimile No.: (302) 651-8882
                Attention: Corporate Trust Administration

          (d) if given to any Holder, at the address set forth on the books and
     records of the Trust.
          All notices hereunder shall be deemed to have been given when received
in person, telecopied with receipt confirmed, or mailed by first class mail,
postage prepaid, except that if a notice or other document is refused delivery
or cannot be delivered because of a changed address of which no notice was
given, such notice or other document shall be deemed to have been delivered on
the date of such refusal or inability to deliver.

          SECTION 8.04.  BENEFIT.  This Guarantee Agreement is solely for the
benefit of the Holders (subject to the benefits inuring to the holders of
Secured Debt pursuant to the subordination provisions hereof) and is not
separately transferable from the HIGH TIDES.

<PAGE>

          SECTION 8.05.  INTERPRETATION.  In this Guarantee Agreement, unless
the context otherwise requires:

          (a) capitalized terms used in this Guarantee Agreement but not defined
     in the preamble hereto have the respective meanings assigned to them in
     Section 1.01;

          (b) a term defined anywhere in this Guarantee Agreement has the same
     meaning throughout;

          (c) all references to "the Guarantee Agreement" or "this Guarantee
     Agreement" are to this Guarantee Agreement as modified, supplemented or
     amended from time to time;

          (d) all references in this Guarantee Agreement to Articles and
     Sections are to Articles and Sections of this Guarantee Agreement unless
     otherwise specified;

          (e) a term defined in the Trust Indenture Act has the same meaning
     when used in this Guarantee Agreement unless otherwise defined in this
     Guarantee Agreement or unless the context otherwise requires;

          (f) a reference to the singular includes the plural and vice versa;
     and

          (g) the masculine, feminine or neuter genders used herein shall
     include the masculine, feminine and neuter genders.


          SECTION 8.06  GOVERNING LAW.  This Guarantee Agreement shall be
governed by and construed in accordance with the laws of the State of New York
including, without limitation, Section 5-1401 of the New York General
Obligations Law.

          This instrument may be executed in any number of counterparts, each of
which so executed shall be deemed to be an original, but all such counterparts
shall together constitute but one and the same instrument.

<PAGE>

          THIS GUARANTEE AGREEMENT is executed as of the day and year first
above written.


                              The Titan Corporation

                              by

                                --------------------------------------
                                    Name:
                                    Title:


                              Wilmington Trust Company, as Guarantee Trustee,

                              by

                                --------------------------------------
                                    Name:
                                    Title: