Abstract: The porous Ti-15Mo alloy samples with homogeneous pore body-centered cubic (UBCC), face-centered cubic (UFCC) and corresponding gradient pore body-centered cubic (GBCC), face-centered cubic (GFCC) structures were formed by selective laser melting (SLM). The microscopic morphology, compression deformation characteristics and energy absorption characteristics of the alloys were studied. The compression failure behavior was analyzed. The results show that the elastic modulus of SLM formed four kinds of pore structure porous alloys were 0.3-1 GPa and the compressive plateau stress was 28-48 MPa, which were similar to those of human trabecular bone (elastic modulus 0.2-5 GPa and compressive strength 4-70 MPa); the elastic modulus and compressive strength of UFCC and GFCC structure alloys were higher than those of UBCC and GBCC structure alloys, with GFCC structure alloy being the highest. The energy absorption characteristics of the gradient pore structure alloys were better than those of the uniform pore structure, and the GFCC structure alloy had the highest energy absorption characteristics, whose total absorption energy was 6.60 J·cm^-3; Both uniform pore and gradient pore structure alloys caused cracking due to stress concentration at the junction.