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Summary: In this study, the interface characteristics and properties of α-Ti/β-Ti/TiB system were thoroughly investigated using high-resolution transmission electron microscopy (HRTEM), ab-initio calculations, and indentation tests. The results show that the TiB/β-Ti interface has a low interface energy and a high adhesion strength, while the TiB/α-Ti interface has a relatively high interface energy but still maintains a fairly high adhesion strength. Further analysis reveals that the homogeneous nucleation of α-Ti within the β-Ti phase is energetically preferred in the TiB-reinforced Ti6Al4V composite. Indentation tests confirm a significantly enhanced load-bearing capacity in dual-phase Ti6Al4V alloys due to the strong interfacial bonding achieved by in-situ formed TiB reinforcements.
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