The article studies the influence of the high-temperature deformation on phase composition and physico-mechanical properties of the titanium alloy. Research into the topic allows increasing durability, reliability, and the resource of machines and equipment. Materials and designs of machines and equipment are constantly getting upgraded in the world, therefore, it is very important not only to use already known methods of materials research, but also to develop and improve research methods and techniques. In this scientific project, a two-phase titanium alloy 3M was investigated at different degrees of high-temperature deformation (80%, 83%, 86%, 90%, 93%). The authors carried out phase studies using the methods of optical metallography and instrumental indentation. The relationships between the structural-phase state, physical and mechanical properties of titanium alloy 3M with a change in the degree of deformation have been established. The study of the phase composition, properties of the α- and β-phase by the method of indentation of samples with different degrees of hot deformation of the 3M alloy made it clear that with an increase in the degree of deformation, the fraction of the α-phase in the alloy increases, and the material becomes harder and less plastic.