Oxygen-mediated high uniform plasticity in α-β titanium alloys.

ABSTRACT: Titanium alloys are critically important materials, yet their development has long been constrained by a fundamental trade-off between yield strength and uniform elongation-a more challenging limitation than the conventional strength-ductility trade-off. Here, we present a dual strategy for α-β titanium alloys that transforms high oxygen from an embrittling liability into a powerful performance enabler. First, we leverage high oxygen ( ≥0.40%) to activate prominent pyramidal slip in the α-phase. Second, we engineer a tailored α-β microstructure through alloy design (Ti-O-Fe), laser-based powder bed fusion, and annealing to enable sustained slip transfer across α-β interfaces. The resulting high-strength α-β alloys achieve record uniform elongations: Ti-0.45O-4Fe delivers ≥14% (tota

SUBMITTER: Yang Y 

PROVIDER: S-EPMC12672622 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature