| Abstract Scope |
Due to the competition of planar slips, cross-slip has been rarely reported in the deformation of bulk near-α titanium alloys, which are a group of materials extensively used in aerospace applications. In this study, we report a non-uniform activation of cross-slips in α colonies upon the deformation of a near-α titanium alloy, by the observation of prominent wavy slip traces on the sample surface.
We demonstrate the competition between cross-slip and planar slips in α colonies. Additionally, we propose that the non-uniform activation of cross-slip in the α grains enhances microscale deformation heterogeneity and the tendency of boundary micro-cracking, which may deteriorate tensile ductility. This work provides perspectives on the activation of cross-slip and their impact on the mechanical performance of titanium alloys. |