Abstract: TC4 titanium alloy specimens were fabricated via selective laser melting (SLM),and the effects of laser power of 175-250 W and scanning speed of 900,1100 mm/s on the material's density,microstructure,texture evolution and comprehensive properties were systematically investigated.The experimental results indicate that parameters of 175 W,1100mm/s achieve high density (>99.8%) and induce a fine and homogeneous α+β duplex microstructure with weak anisotropic texture through balancing heat input and solidification of melt pool.The α-phase0001basal texture exhibits moderate intensity with dispersed orientations in1010and1120directions.This texture characteristic combined with grain refinement strengthening and stress homogenization endow the material with outstanding mechanical properties and corrosion resistance.In contrast,the combination of high laser power and low scanning speed (250 W,900 mm/s) leads to excessive thermal input,resulting in intensified α-phase basal texture,grain coarsening,and microcrack formation,which significantly degrades mechanical performance and high-temperature oxidation resistance.The process parameters directly influence texture intensity and orientation distribution by regulating solidification behavior and β→α phase transformation,thereby determining the material's performance synergy.This research provides theoretical and technical guidance for SLM-fabricated high-strength,corrosion-resistant TC4titanium alloy components.