Patent ID: 9255317
Filing Date: 2016-02-09
CPC Classification: C22F

Claim Text:
1. A method of cold forming titanium alloy sheet metal, the titanium alloy consisting of 5.5 to 6.75 wt % aluminum, 3.5 to 4.5 wt % vanadium and the balance titanium plus incidental impurities, the method comprising the sequential steps of (a) applying a coating to prevent the formation of an oxide to both surfaces of the titanium alloy sheet metal before heat treating, (b) heat treating the titanium alloy sheet metal at at least 700° C. for at least 30 minutes, (c) abrasive blasting both surfaces of the titanium alloy sheet metal to remove at least 6 microns, (d) etching to remove 20 to 25 microns from both surfaces of the titanium alloy sheet metal, and (e) cold forming the heat treated titanium alloy sheet metal at room temperature.