Method of making an article of a titanium alloy by plastically deforming at room temperature and/or polishing

Abstract

A method of making an article of a titanium alloy is disclosed, which includes i) quenching a work piece, which is made of a titanium alloy composition containing a) about 0.01-5 wt % Bi based on the weight of the composition; b) at least one alloy element selected from the group consisting of Mo, Nb, Ta, Zr and Hf; and c) the balance Ti, having a temperature higher than a beta transition temperature of the titanium alloy composition to a temperature lower than 500° C. at a cooling rate greater than 10° C./second between the beta transition temperature and 500° C., so that the quenched work piece contains beta phase as a major phase; and ii) plastically deforming the quenched work piece or polishing the quenched work piece so that a surface of the polished work piece has an average surface roughness less than about 0.1 μm.

Dependencies are inferred from the claim text.