Features of Changes in the Surface Structure and Phase Composition of the of α + β Titanium Alloy after Electromechanical and Thermal Treatment oleh Vyacheslav Petrovich Bagmutov, Valentin Ivanovich Vodopyanov, Igor Nikolaevich Zakharov, Alexander Yurievich Ivannikov, Artem Igorevich Bogdanov, Mikhail Dmitrievich Romanenko, Vladislav Valerievich Barinov