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 ℃ 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 α phase (α_p). During PSC, the activation of basal and _prismatic 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 α_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 α_p but initially enhanced in α_s at lower reductions (30 %-50 %) due to α-fiber texture inheritance. However, at 70 % reduction, it further weakened due to dynamic recrystallization (DRX) of β grains. Notably, the formation of unique {11−20} α_s fiber texture, inherited from the {111} fiber texture of the prior β phase induced by grain rotation, was analyzed in detail. Furthermore, significant deformation resulted in more α_p grains (<0001 >//TD) following the BOR with adjacent β grains belonging to the α-fiber texture, which facilitated the degree of variant selection, causing α_s to preferentially align with the orientation of the neighboring α_p grains.