Kronos Worldwide, Inc.                        Contact:   Gregory M. Swalwell
Three Lincoln Centre                                     Vice President, Finance
5430 LBJ Freeway, Suite 1700                             (972) 233-1700
Dallas, TX  75240-2697
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News Release
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FOR IMMEDIATE RELEASE

[LOGO GOES HERE]

                 KRONOS WORLDWIDE REPORTS SECOND QUARTER RESULTS


DALLAS,   TEXAS...August  3,  2005...Kronos  Worldwide,  Inc.  (NYSE:KRO)  today
reported net income for the second quarter of 2005 of $32.9 million, or $.67 per
diluted share,  compared with net income of $284.8 million, or $5.82 per diluted
share,  in the second quarter of 2004. For the first six months of 2005,  Kronos
reported net income of $54.3 million, or $1.11 per diluted share,  compared with
net  income of $294.6  million,  or $6.02 per  diluted  share,  in the first six
months of 2004.  The primary reason for the difference in net income between the
periods is due to certain income tax benefits  recorded in the second quarter of
2004, as described herein.

Net sales of $311.7 million in the second quarter of 2005 were $15.9 million, or
5%, higher than the second  quarter of 2004. Net sales of $603.5 million for the
first six months of 2005 were $44.4  million,  or 8%,  higher than the first six
months of 2004. Both increases are due to the net effects of higher average TiO2
selling prices,  lower sales volumes and the favorable effect of fluctuations in
foreign  currency  exchange rates,  which increased sales by  approximately  $10
million and $21 million, respectively.

The  Company's  TiO2 segment  profit (see  description  of non-GAAP  information
below) for the  second  quarter of 2005 was $59.2  million  compared  with $40.1
million in the second  quarter of 2004, and was $107.2 million for the first six
months of 2005  compared  with $66.4  million  for the first six months of 2004.
Segment  profit  improved due to the net effects of higher  average TiO2 selling
prices,  higher  production  volumes  and  lower  sales  volumes.   Furthermore,
fluctuations  in foreign  currency  exchange rates  favorably  impacted  segment
profit  comparisons by  approximately  $2 million and $3 million for the quarter
and year-to-date periods, respectively.  Segment profit in the second quarter of
2004 includes $6.3 million of income ($4.1  million,  or $.08 per diluted share,
net of income  taxes)  related to the  settlement  of a contract  dispute with a
customer.

The Company's  average selling prices in billing  currencies (which excludes the
effects  of  fluctuations  in the  value of the U.S.  dollar  relative  to other
currencies)  during the second quarter and first six months of 2005 were 11% and
10% higher  than the  respective  periods  of 2004.  Expressed  in U.S.  dollars
computed using actual foreign  currency  exchange  rates  prevailing  during the
respective  periods,  the Company's average selling prices in the second quarter
of 2005 were 15% higher  than the second  quarter of 2004 and 14% higher for the
first  six  months  of  2005  compared  with  2004.   Reflecting  the  continued
implementation  of price increase  announcements,  the Company's average selling
prices  in  billing  currencies  in the  second  quarter  of 2005 were 2% higher
compared to the first quarter of 2005.

The  Company's  second  quarter 2005 TiO2 sales  volumes  decreased 10% from the
second  quarter of 2004, as sales volumes were lower in all markets.  TiO2 sales
volumes for the first six months of 2005  decreased 7% from the first six months
of 2004.  The Company's  TiO2  production  volumes were 4% higher in each of the
second  quarter and first six months of 2005 as compared to the same  periods in
2004, with operating  rates at near full capacity in all periods.  The Company's
finished  goods  inventories  at June 30, 2005,  which  represented  2 months of
average sales, were higher compared to March 31, 2005.  Production volume in the
first six months of 2005 was a new record for Kronos.

The Company's results in the second quarter of 2005 include a securities
transaction gain of $5.4 million ($3.5 million, or $.07 per diluted share, net
of income taxes) related to a gain on the sale of the company's passive interest
in a Norwegian smelting operation.


<PAGE>



Interest  expense to affiliates for the second quarter and six months ended June
30, 2004 relates  primarily  to the  Company's  $200  million 9% long-term  note
payable to  affiliates  issued in December  2003,  which was prepaid in November
2004.  Other  interest  expense  increased  due  primarily  to higher  levels of
indebtedness  resulting  from the  issuance of an  additional  (euro)90  million
principal  amount  of the  Company's  Senior  Secured  Notes in  November  2004.
Additionally,  other  interest  expense  increased  due to  relative  changes in
foreign currency  exchange rates,  which increased the U.S. dollar equivalent of
interest expense on the Company's  (euro)285 million Senior Secured Notes issued
in  June  2002  (and   outstanding   during  the  second  quarter  of  2004)  by
approximately $400,000 and $1 million in the second quarter and first six months
of 2005, respectively, as compared to the year-ago periods.

As  previously-reported,  the  Company's  income tax benefit in the 2004 periods
includes a second  quarter  $268.6 million tax benefit ($5.49 per diluted share)
related to the  reversal  of a deferred  income  tax asset  valuation  allowance
attributable to the Company's income tax attributes in Germany  (principally net
operating loss carryforwards).

The statements in this release relating to matters that are not historical facts
are  forward-looking   statements  that  represent   management's   beliefs  and
assumptions  based on  currently  available  information.  Although  the Company
believes that the expectations reflected in such forward-looking  statements are
reasonable,  it cannot give any assurances that these expectations will prove to
be correct.  Such  statements  by their  nature  involve  substantial  risks and
uncertainties  that could  significantly  impact  expected  results,  and actual
future   results  could  differ   materially   from  those   described  in  such
forward-looking  statements.  While it is not  possible to identify all factors,
the Company  continues  to face many risks and  uncertainties.  The factors that
could cause actual  future  results to differ  materially  include,  but are not
limited to, the following:

o    Future supply and demand for the Company's products,
o    The cyclicality of certain of the Company's businesses,
o    Customer inventory levels,
o    Changes in raw material and other operating costs,
o    The possibility of labor disruptions,
o    General global economic and political conditions,
o    Competitive products and substitute products,
o    Customer and competitor strategies,
o    The impact of pricing and production decisions,
o    Competitive technology positions,
o    Fluctuations in currency exchange rates,
o    Operating interruptions,
o    The ability of the Company to renew or refinance credit facilities,
o    The ultimate  outcome of income tax audits,  tax settlement  initiatives or
     other tax matters,
o    The ultimate ability to utilize income tax attributes, the benefit of which
     has been recognized under the "more-likely-than-not" recognition criteria,
o    Government laws and regulations and possible changes therein,
o    The ultimate resolution of pending litigation, and
o    Possible future litigation.

Should one or more of these risks  materialize  (or the  consequences  of such a
development  worsen),  or should the  underlying  assumptions  prove  incorrect,
actual results could differ  materially from those  forecasted or expected.  The
Company   disclaims  any  intention  or  obligation  to  update  or  revise  any
forward-looking statement whether as a result of changes in information,  future
events or otherwise.


<PAGE>



In an effort to provide  investors  with  additional  information  regarding the
Company's results as determined by accounting  principles  generally accepted in
the  United  States of America  ("GAAP"),  the  Company  has  disclosed  certain
non-GAAP  information which the Company believes provides useful  information to
investors:

o    The Company discloses percentage changes in its average TiO2 selling prices
     in billing  currencies,  which  excludes  the  effects of foreign  currency
     translation.  The Company  believes  disclosure of such percentage  changes
     allows  investors to analyze such changes  without the impact of changes in
     foreign  currency  exchange rates,  thereby  facilitating  period-to-period
     comparisons  of  relative  changes in average  TiO2  selling  prices in the
     actual various billing currencies.  Generally,  when the U.S. dollar either
     strengthens or weakens against other  currencies,  the percentage change in
     average TiO2 selling prices in billing  currencies will be higher or lower,
     respectively,  than such percentage  changes would be using actual exchange
     rates prevailing during the respective periods.

o    The  Company  discloses  segment  profit,  which  is used by the  Company's
     management to assess the performance of the Company's TiO2 operations.  The
     Company believes  disclosure of segment profit provides useful  information
     to investors  because it allows investors to analyze the performance of the
     Company's  TiO2  operations in the same way that the  Company's  management
     assesses  performance.  The Company defines segment profit as income before
     income  taxes,  interest  expense  and  certain  general  corporate  items.
     Corporate items excluded from the  determination  of segment profit include
     corporate  expense and interest  income not  attributable  to the Company's
     TiO2 operations.

Kronos  Worldwide,  Inc. is a major  international  producer of titanium dioxide
pigments.



<PAGE>



                             KRONOS WORLDWIDE, INC.
                   CONDENSED CONSOLIDATED STATEMENTS OF INCOME
               (In millions, except per share and metric ton data)
                                   (Unaudited)

<TABLE>
<CAPTION>

                                                                  Three months ended          Six months ended
                                                                       June 30,                   June 30,
                                                               -----------------------------------------------------
                                                               -----------------------------------------------------
                                                                   2004        2005          2004         2005
                                                               -----------------------------------------------------
                                                               -----------------------------------------------------

<S>                                                             <C>          <C>          <C>           <C>
Net sales                                                       $    295.8   $   311.7    $    559.1    $   603.5
Cost of sales                                                        227.5       217.1         429.8        424.7
                                                                ----------   ---------    ----------    ---------

    Gross margin                                                      68.3        94.6         129.3        178.8

Selling, general and administrative expense                           35.0        37.8          70.2         75.1
Other operating income (expense):
  Currency transaction gains, net                                       .3         2.4            .6          3.3
  Contract dispute settlement                                          6.3         -             6.3          -
  Other income (expense)                                              -            (.1)          -            -
                                                                       (.8)       (1.4)         (1.3)        (2.9)
                                                                ----------  ---------     ---------    ----------

    Income from operations                                            39.1        57.7          64.7        104.1

Other income (expense):
  Trade interest income                                                 .2          .1            .4           .2
  Other interest income                                                 .2          .3            .4           .7
  Securities transaction gain                                         -            5.4           -            5.4
  Interest expense to affiliates                                      (4.5)        -            (9.0)         -
  Other interest expense                                              (8.6)      (11.6)        (17.8)       (23.4)
                                                               -----------  ----------    ----------   ----------

    Income before income taxes                                        26.4        51.9          38.7         87.0

Income tax expense (benefit)                                        (258.4)       19.0        (255.9)        32.7
                                                               -----------  -----------   ----------   ----------

    Net income                                                 $     284.8  $     32.9   $     294.6   $     54.3
                                                               ===========  ==========   ===========   ==========

Basic and diluted net income per share                         $      5.82  $      .67   $       6.02  $     1.11
                                                               ===========  ===========  ============  ==========


Basic and diluted weighted-average
shares used in the calculation of net
income per share                                                      48.9        48.9          48.9         48.9

TiO2 data - metric tons in thousands:
  Sales volumes                                                      136         122           255          237
  Production volumes                                                 122         127           240          249
</TABLE>




<PAGE>


                             KRONOS WORLDWIDE, INC.

                       RECONCILIATION OF SEGMENT PROFIT TO
                             INCOME FROM OPERATIONS
                                  (In millions)
                                   (Unaudited)

<TABLE>
<CAPTION>

                                                                  Three months ended          Six months ended
                                                                       June 30,                   June 30,
                                                               -----------------------------------------------------
                                                               -----------------------------------------------------
                                                                   2004        2005          2004         2005
                                                               -----------------------------------------------------
                                                               -----------------------------------------------------

<S>                                                            <C>          <C>           <C>         <C>
Segment profit                                                 $     40.1   $    59.2     $    66.4     $  107.2
Adjustments:

   Trade interest income                                              (.2)        (.1)          (.4)         (.2)

   Corporate expense                                                  (.8)       (1.4)         (1.3)        (2.9)
                                                               ----------   ---------     ---------     --------

Income from operations                                          $     39.1  $    57.7     $     64.7    $  104.1
                                                                ==========  =========     ==========    ========
</TABLE>



                     RECONCILIATION OF PERCENTAGE CHANGE IN
                             AVERAGE SELLING PRICES
                                   (Unaudited)

<TABLE>
<CAPTION>

                                                                  Three months ended            Six months ended
                                                                       June 30,                     June 30,
                                                                     2005 vs. 2004               2005 vs. 2004
                                                                   ----------------            ----------------


<S>                                                                     <C>                         <C>
Percentage change in average selling prices:
    Using actual foreign currency exchange rates                            +15%                        +14%
    Impact of changes in foreign currency exchange rates                     -4%                         -4%
                                                                        --------                    --------
    In billing currencies                                                   +11%                        +10%
                                                                        ========                    ========
</TABLE>