Microtexture Evolution of Titanium Alloy During Hot Deformation: for Better Understanding the Role of Primary Α Grains

Regions with sharp local texture, called macrozones, are often found in titanium alloy forgings and can reduce fatigue performances. This study observed the evolution of macrozones during hot compression of the Ti–5Al–2Sn–2Zr–4Mo–4Cr alloy in the α + β field. The results show that the macrozones are primarily related to the prior β grains and remained stable during compression. We analyzed the evolution of the β phase inter-structure at various deformation parameters, discussed the role of the primary α grains on the recrystallization of β grains. From studying the microstructural characteristics of the material, the effect of deformation parameters on the microstructure evolution was discussed by combining the effect of the primary α grains. New insights to identify the stability of the macrozones are revealed.