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The evolution of primary α phase morphology and mechanical properties of a new high-strength titanium alloy during heat treatment were investigated. The results show that the primary α phases tend to globular growth feature on the basis of the equiaxed α phases underα/β zone double solution treatment at air cooling process. But abnormal growth of primary α grains occurs in the 0.5℃/minfurnace cooling processwhich except some primary alpha remains spherical growth, another parts evolve similar “fork” shapeddendritic growth rather than keep nearly spherical growth trend. The new titanium alloy leads to attractive combinations of strength and ductility (≈1300MPa of ultimate strength with 10.5% of elongation) at the microstructures obtained a few equiaxed or thin billet-like primary α phase and fine lamellar secondary α phase under α/β solution treatment followed by air cooling plus aging.The new alloyafter α/β solution treatment followed furnace cooling to low temperature and then aging heat treatment process has an excellent values (≥80 MPa?m1/2). Meanwhile, the elongation and reduction ofarea remain at about 19% and 45% respectively, and its corresponding tensile strength maintains at about1000 MPa.It can be assumed that the alloy may be a usable structural material.