Achieving basal texture in pure titanium: Process implementation and mechanical property evaluation

Abstract

The strong crystallographic texture in titanium sheets leads to anisotropic mechanical properties, complicating 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, $\epsilon \%$). Notably, while the basal texture is seldom intentionally produced in titanium sheets, it is well-documented in magnesium alloys, where it promotes isotropic properties within 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.