Rhino　software　was　utilized　to　design　porous　TC4　orthopedic　implant　models,and　statics　simulation　was　conducted　combined　with　finite　element　analysis　to　obtain　porous　structures　as　well　as　stress　distribution　and　equivalent　elastic　modulus　under　different　porosities.　Porous　TC4　orthopedic　implants　were　printed　by　laser　selective　melting　(SLM),and　quasi-static　compression　experiments　and　nanoindentation　experiments　were　carried　out　to　investigate　the　heterogeneity　in　mechanical　properties　of　porous　structures　with　different　porosities.　The　simulation　results　reveal　that　with　increasing　in　the　porosities　of　porous　structures,the　average　stress　is　decreased.　With　the　same　porosity,the　average　stress,equivalent　elastic　modulus　and　permeability　of　regular　porous　structures　are　greater　than　those　of　irregular　ones.　The　elastic　modulus　of　regular　porous　structure　is　between　4.18~9.71　GPa,and　that　of　irregular　porous　structure　is　between　2.69~5.84　GPa,meeting　the　elastic　modulus　range　of　human　bone.　The　compressive　strength,elastic　modulus　and　wear　resistance　of　the　regular　porous　structures　are　greater　than　those　of　irregular　ones,which　is　in　consistent　with　the　simulation　results.　©　2024　Journal　Office　of　Special　Casting　and　Nonferrous　Alloys.　All　rights　reserved.