Superior room/high-temperature performance in Ti60-based composite reinforced with nano-scale multimodal (TiB_w + La₂O₃) hybrid reinforcements

To achieve the superior mechanical properties in titanium matrix composites (TMCs), nano-scale multimodal (TiB_w + La₂O₃) hybrid reinforcements were successfully introduced in Ti60 matrix by utilizing a novel built-in groove ball milling (BGBM) technique. The experimental results indicated that the 0.2 wt% LaB₆/Ti60 composite demonstrated a room temperature ultimate tensile strength (σ_u) of 1412 ± 3 MPa with an elongation of 8.6 ± 0.25 %. The σ_u at 600 °C and 700 °C were recorded at 858 MPa and 605 MPa, respectively. The nano-scale multimodal structures of the TMCs, including the TiB_w, La₂O₃ and their interfacial/intragranular distribution, played a predominant role on the strengthening-toughening effect. This research offered a promising strategy and valuable insights for developing high performance TMCs in both ambient and high temperature environment.