Abstract
Single-phase ω-phase Ti with a considerable size of 3 mm × 3 mm × 4 mm and a Vickers hardness of 2.5 GPa is synthesized under high pressure and combined with a designed experimental curve at room temperature. The elastic properties of the α- and ω-phase Ti are ascertained using the non-destructive ultrasonic through-transmission technique. Based on the investigated Raman spectra and DSC, the inverse transition temperature of the metastable ω-phase and Raman spectra of the α- and ω-structures are also discussed. Modulations on the elastic and spectral properties of the two phases are simulated using first-principles calculations to systematically investigate the mechanical responses under biaxial strains.
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