The diamter of -titanium alloy wire is reduced by cold wire-drawing and the -titanium alloy wire is subjected to heat treatment. The heat treatment comprises the first aging process for precipitation strengthening and the second aging process for removing processing strain. -titanium alloy wire is heat-treated...http://www.google.co.uk/patents/US6800153?utm_source=gb-gplus-sharePatent US6800153 - Method for producing 
