Effect of the allotropic transition in titanium on its interatomic interaction energy

The variation of interatomic interaction energy during allotropic transition in titanium is established by analyzing the stress and temperature dependences of durability. This energy is $\approx$ 458 kJ/mol in bodycentered $\beta$-Ti at a temperature of $T>$ 1155 K, which agrees well with the titanium sublimation heat, and $\approx$ 305 kJ/mol in hexagonal close-packed $\alpha$-Ti at $T<$ 1155 K. Literature data confirming the conclusions drawn are discussed.