SS316L alloy coupled with Inconel625 alloy were combined with Ti6Al4V or Inconel718 alloy through wire arc additive manufacturing technique to manufacture functionally graded materials (FGMs). Two FGMs, namely 60% SS316L+20% Inconel625+20% Ti6Al4V composite and 60% SS316L+20% Inconel625+20% Inconel718 composite, were prepared. The tensile strength, elongation, yield strength, hardness, cross section area of the parent material, and composition were analysed. Results illustrate that the 60% SS316L+20% Inconel625+20% Inconel718 composite has better mechanical properties than 60% SS316L+20% Inconel625+20% Ti6Al4V composite, and the comprehensive properties of 60% SS316L+20% Inconel 625+20% Ti6Al4V composite are better than those of the parent material SS316L. Hence, the composite of 60% SS316L+20% Inconel625+20% Inconel718 is optimal. Due to its high strength, the 60% SS316L+20% Inconel625+20% Inconel718 composite has great application potential in the field of high pressure pneumatic tool and defence tool.