FIELD: machine engineering. SUBSTANCE: method comprises steps of acting upon a blank by an impact wave and by heated up products of explosion of gaseous combustible mixture successively several times in time intervals being no more, than 1 min; before each action setting an initial pressure of the gaseous mixture according to conditions; providing subsequent heating of the blank by the products of the explosion up to a temperature of its recrystallization annealing; determining an initial pressure value of the gaseous mixture according to a relation, given in a description of the invention. EFFECT: enhanced efficiency. 1 cl, 7 dwg
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