FIELD: metallurgy.
SUBSTANCE: method involves plastic deformation and thermomechanical processing. Plastic deformation of workpieces is performed at temperature below 300°C so that total deformation degree of 10-40% is provided; thermomechanical processing is performed by heating the workpieces to temperature which is lower than recrystallisation temperature by 10-250°C and deformation with deformation degree of not less than 50%, and then, cooling of workpieces is performed to temperature of 20-300°C and deformation with deformation degree of not less than 60% so that logarithmic deformation degree of not less than 1.7 is provided. After thermomechanical processing the annealing is performed at temperature below 350°C.
EFFECT: obtaining the alloy grain size of 250-80 nm without using any intensive plastic deformation at processing of large-sized workpieces from titanium alloys.
2 cl, 2 dwg, 2 ex
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