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This invention belongs to the field of materials processing and preparation technology, and provides a method for accelerating the martensitic decomposition of additive titanium alloys with high-energy short-time pulsed current. By designing pulsed current parameters, this invention establishes a quantitative relationship between current density, action time and microstructure evolution, thereby effectively suppressing grain coarsening while efficiently driving the rapid decomposition of acicular martensite. Ultimately, it breaks through the traditional constraint between strength and plasticity in additively manufactured titanium alloys, and achieves significant optimization of its comprehensive mechanical properties.