Multiple deformation mechanisms of Ti-22.4Nb-0.73Ta-2.0Zr-1.34O alloy

Ti-22.4Nb-0.73Ta-2.0Zr-1.34O (at. %) alloy after cold compression to similar to 5.2% strain was investigated. The alloy exhibited multiple plastic deformation mechanisms, including the stress-induced alpha(') martensitic (SIM alpha(')) and omega phase transformations, 1/2 < 111 > dislocations slipping on the {112}beta planes as well as {332}< 113 >beta and {112}< 111 >beta twinning, which have not previously been reported to coexist in a titanium alloy. It was also found that beta phase with the {200} planes vertical to the compression direction was almost completely consumed away by a beta -> SIM alpha(') transformation, and a (100) texture of SIM alpha(') formed.