Development of 〈001〉-fiber texture in cold-groove-rolled Ti-Mo-Al-Zr biomedical alloy

Abstract The 〈001〉 β -fiber texture, which is a highly desirable orientation for β-Ti alloys with low Young's modulus, was formed successfully in cold-groove-rolled Ti-5.5Mo-8Al-6Zr (mol.%) alloy wires. The effect of a reduction in the cross-sectional area (CSA) on the evolution of the rolling and recrystallization texture, as well as the Young's modulus, was systematically investigated. The formation of α″-martensite was induced by the cold-groove-rolling process, with a 〈010〉 α″ -fiber texture developing in specimens with CSA reductions of 93% or more. This texture corresponds to the 〈110〉 β -fiber texture considering the lattice correspondence of the martensitic transformation between the β (bcc) - and α″ (orthorhombic) -phases. The 〈001〉 β -fiber recrystallization texture was formed in solution-treated specimens with CSA reductions of 80% or more and developed dramatically with a reduction of 98%. The development of the 〈001〉 β -fiber texture as the dominant component has not been reported previously in conventional β-Ti alloys, although the 〈110〉 β -fiber texture is the same as the deformation texture of conventional bcc alloys. The Young's modulus of the solution-treated specimens along the rolling direction decreased with an increase in the CSA reduction rate. This was attributed to the development of the 〈001〉 β -fiber texture.