The high yield ratio and low strain hardening ability of titanium alloys significantly limit their engineering applications. In this work

a Ti

65

Zr

30

Cu

5

(at.%) alloy with nanoscale α laths was additively manufactured and achieved a high yield strength of 1274 MPa and a high strain hardening rate up to 40% of the shear modulus. Results show that universal basal/pyramidal dislocation reactions occur during the tensile deformation process. This triggers high-density sessile 〈c 〉 dislocation junctions

which accumulate and pin other mobile dislocations. Consequently

abundant dislocation walls are induced

leading to a strong hetero-deformation-induced strain hardening effect.