Patent ID: 7708845

Claim:
A method for manufacturing thin sheets of high-strength titanium 5 alloys, said method including: preparing initial blanks; assembling the initial blanks into a pack within a sheath, and heating and hot rolling the pack of the initial blanks in the sheath; in the operation of preparing the initial blanks, the blanks having an α-phase grain size of not more than 2 μm are produced by hot rolling a forged or die-forged slab to a predetermined value of a relative thickness h B /hF, where h B is a thickness in millimeters of the initial blank before said pack hot rolling and hF is a final sheet thickness in millimeters, and by heat treating the initial blanks followed by rapidly cooling; and in that the operation of pack hot rolling is conducted at a temperature of from about 650° C. to about 750° C. first in a direction transverse with respect to a slab rolling direction, and to achieve a thickness reduction of the pack of about 60%-70%, and then changing a rolling direction by about 90° C. and pack hot rolling to achieve an additional degree of thickness reduction of the pack.