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Continuous grain boundary α (α_GB) is widely present in near β and β titanium alloys, and is deleterious to the ductility. Although traditional wrought-based processing can reduce the continuous α_GB, they are not suitable for titanium alloy components fabricated by near-net-shape processing methods, because the wrought-based processing is accompanied by shape change. Hence, the aim of this work is to develop a new heat treatment method, which can obtain discontinuous α_GB and apply to near-net-shape titanium alloy components. First, the detailed formation process of the continuous α_GB was investigated to determine the factors which control the continuous extent of α_GB. Then, based on that investigation, a novel pre-heat treatment was designed through directly controlling the nucleation rate and growth morphology of α_GB. The results indicated that the pre-heat treatment could lead to coarse and …