Features of recrystallization for a textured pseudo-α-alloy of titanium

Conclusions

• 1. Three temperature regions have been established where during annealing textured VT6S pseudo-α-alloy after deformation there are different processes:

• I) 400–750°C, decomposition of residual β-phase followed by coalescence of decomposition products;

• II) 750–950°C, recrystallization and spheroidization of α-platelets a small increase in the degree of texturing after annealing at 900–950°C as a result of an increase in strains during texture recrystallization;

• III) 950–1050°C, selective recrystallization, a change in phase composition and shape of structural components, and a significant reduction in the degree of texturing.

• 2. Annealing in the recrystallization temperature range leads to more marked reduction in strength properties of transverse specimens than for longitudinal specimens.

• 3. A consequence of the loss of texture, increasing with an increase in annealing temperature in the range of 950–1050°C, is a reduction in the strength properties of transverse specimens, whereas the strength of longitudinal specimens does not change. A certain "inheritance" of the texture, caused by alloy property anisotropy, is retained even with annealing above the polymorphic transformation temperature.