采用激光快速成形技术在纯钛基板上制备了Ti_(70.38)Fe_(26.39)Sn_(2.93)Y_(0.3)四元共晶合金成形体,测试研究了该合金成形体的微观组织、硬度、弹性模量和耐蚀性能,并与Ti_(70.58)Fe_(29.42)二元共晶合金成形体进行了对比。分析结果表明,在激光快速成形非平衡凝固条件下,Ti_(70.38)Fe_(26.39)Sn_(2.93_Y_(0.3)合金成形体的凝固组织是TiFe初晶和β-Ti+TiFe共晶组成的过共晶组织。与Ti_(70.58)Fe_(29.42)二元共晶合金成形体相比,Ti_(70.38_Fe_(26.39)Sn_(2.93)Y_(0.3)合金成形体的硬度提高了59.6%,弹性模量降低了30%,且在Hank′s溶液中展示出优异的耐蚀性。 Ti (70.38) Fe_ (26.39) Sn_ (2.93) Y_ (0.3) quaternary eutectic alloy was prepared on pure titanium by laser rapid prototyping. The microstructure, hardness and elasticity Modulus and corrosion resistance of Ti_ (70.58) Fe_ (29.42) binary eutectic alloy. The results show that the solidified microstructure of the Ti 70.38 Fe 26.39 Sn 2.93_Y 0.3 alloy formed by eutectic TiFe primary and β-Ti + TiFe eutectic under laser rapid forming non-equilibrium solidification Eutectic microstructure.The hardness of Ti_ (70.38_Fe_ (26.39) Sn_ (2.93) Y_ (0.3)) alloy was 59.6% higher than that of Ti_ (70.58) Fe_ (29.42) binary eutectic alloy. The amount is reduced by 30% and exhibits excellent corrosion resistance in Hank’s solution.