In　this　study,　laser　melting　deposited　TA15　alloy　was　examined　by　in-situ　SEM　tensile　deformation　at　a　range　of　temperatures;　RT,　300　and　500.　The　as-fabricated　microstructure　consists　of　prior　ß　grains　boundaries　and　fine　basketweave　microstructure.　Due　to　LMD　fabricated　alloys＇　anisotropic　behavior,　the　tested　samples　were　collected　from　the　same　region　and　direction.　The　XRD　and　SEM　results　showed　that　the　temperature　up　to　500　has　no　impact　on　the　phase　constituent　and　structure　morphology,　revealing　a　stable　microstructure.　The　tensile　deformation　at　room　temperature　(RT)　revealed　that　slip　lines　were　the　primary　deformation　mechanism　generated　in　the　parallel　and　larger　alpha　grain.　An　increase　in　temperature　triggered　grain　boundary　sliding　during　deformation,　which　enhanced　the　elongation　in　the　material　at　the　cost　of　tensile　strength　reduction.　The　grain　boundary　resistance　to　dislocation　slip　was　affected　by　the　sliding　phenomenon　due　to　increased　temperature.　Overall,　the　material　showed　stable　tensile　characteristics　related　linearly　to　the　temperature　variation.　©　Published　under　licence　by　IOP　Publishing　Ltd.