Microstructure and Texture Evolution of Ti65 Alloy during Thermomechanical Processing

The initial microstructure of titanium alloy in the α + β phase region is pivotal in dictating the performance of the final products after thermomechanical processing. Microstructures and textures of three rods, each prepared through distinct pretreatments, were systematically analyzed. Morphological analysis reveals that while both thick α platelets and coarse prior β grains impede the spheroidization of lamellar structures, the influence of the former is more pronounced. Variations in α platelet thickness prior β grain size exhibit limited impact on the macro-texture type after deformation and annealing. The proportion of low-angle interfaces between the c-axis of the primary α phase and the < 110 > direction of the prior β grains was elevated in rods with thicker platelets compared to thinner ones.