Mechanisms of Slip Modes and Texture Inheritance in Ti60 Alloy During Plane Strain Compression: Insights from Texture Evolution and Regulation

Rolling texture significantly influences the mechanical properties of titanium plates, making it essential to elucidate and control texture evolution for optimized service performance. This study employed plane strain compression (PSC) at 930 degrees C to investigate the texture evolution during the rolling process of Ti60 alloy. Two primary texture components, < 0001 > //TD (TD-component) and < 0001 > //RD (RD-component), were found to evolve distinctly. The TD-component was governed by the slip modes of the primary alpha phase (alpha(p)). During PSC, the activation of basal and (p)rismatic slip systems was identified as a critical factor in accommodating deformation. And with increasing reduction, the TD-component was markedly strengthened, primarily due to the basal slip-induced grain rotation in alpha(p), as confirmed by intragranular orientation analysis and global Schmid factor calculations. While the RD-component exhibited a more complex evolution: it was consistently weakened by activation of pyramidal slip and mechanical twinning in alpha(p) but initially enhanced in alpha(s) at lower reductions (30 %-50 %) due to alpha-fiber texture inheritance. However, at 70 % reduction, it further weakened due to dynamic recrystallization (DRX) of beta grains. Notably, the formation of unique {11-20} alpha(s) fiber texture, inherited from the {111} fiber texture of the prior beta phase induced by grain rotation, was analyzed in detail. Furthermore, significant deformation resulted in more alpha(p) grains (<0001 >//TD) following the BOR with adjacent beta grains belonging to the alpha-fiber texture, which facilitated the degree of variant selection, causing alpha(s) to preferentially align with the orientation of the neighboring alpha(p) grains.