The　phase　transition,　microstructure,　detailed　structures　and　tensile　properties　of　selective　laser　melted　Ti6Al4V　alloy　were　been　examined　and　analyzed.　The　results　reveal　that　the　as-fabricated　Ti6Al4V　samples　consist　of　lamellar　alpha＇　and　acicular　alpha＇.　Much　twins　in　the　lamellar　alpha＇　and　small　alpha(2)　precipitation　in　the　acicular　alpha＇　were　found.　The　effects　of　different　heat　treatment　methods　on　the　as-fabricated　samples　were　also　investigated.　As　a　result　of　the　microstructure　evolution,　samples　heat-treated　at　800　degrees　C　and　850　degrees　C　for　4　hours　and　cooled　in　air　contain　the　most　beta　and　the　finest　lamellar　alpha,　exhibiting　good　comprehensive　properties.　(C)　2018　Published　by　Elsevier　B.V.