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Abstract

A method of thermomechanically forming, for example forging, rolling, extruding or drawing, an article from a precursor thereof, is described. The method comprises: providing the precursor, for example an ingot, a forging stock, a forging, a bar, a billet or a plate, comprising, substantially comprising, essentially comprising and/or consisting of an α+β Ti alloy having a beta transus temperature β_transus, wherein the precursor defines a set of portions including a first portion; and thermomechanically forming the article from the precursor by heating the first portion and deforming the heated first portion by a total true strain ε_{1, total}, wherein the total true strain ε_{1, total} is greater than a predetermined threshold true strain ε_threshold; wherein thermomechanically forming the article from the precursor comprises i iterations of: (a) heating the first portion to a temperature T_i during a time t_i wherein the temperature T_i is at most the beta transus temperature β_transus; (b) deforming the heated first portion by a true strain ε_1,i, wherein the true strain ε_1,i is at most the predetermined threshold true strain ε_threshold and (c) repeating steps (a) and (b) until the cumulative true strain ε_1,cumulative=Σ_iε1,ieu is the total true strain ε_{1, total} wherein i is a natural number greater than or equal to 2.

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First Claim