Obtaining a Basal Texture in Titanium Alloys: Implementation and Mechanical Properties

Abstract

Titanium alloy sheets typically exhibit a pronounced texture, leading to anisotropy in their mechanical properties, which complicates forming processes. In this article, we outline a straightforward industrial thermomechanical process to achieve a basal texture in commercially pure titanium. This process involves cold rolling followed by annealing, without needing to modify the sheet’s initial grain size or its mechanical properties (E, Rm, ε%). Interestingly, while this basal texture is rarely intentionally produced in titanium sheets, it is well-known in magnesium alloys, where it ensures isotropic properties across the sheet plane. Tensile tests, aided by image correlation, confirm that planar isotropy and an improved deep-drawability (measured by the Lankford coefficient) are attained. Initial EBSD analysis determined the optimal temperature and annealing time. The article will detail the rolling-annealing protocol necessary to achieve this desirable basal texture.

Keywords: Titanium, Cold-rolling, Annealing, In-situ heating, Twinning, Texture