This　study　emphasizes　the　TA15　alloy　microstructural　distribution　fabricated　by　the　laser　melting　deposition　(LMD)　technique.　The　motivation　of　the　study　is　to　analyze　the　microstructural　features,　such　as　grain　or　laths　thickness,　phase　fraction,　and　porosity　occurrence　in　the　different　regions　along　the　build　height,　due　to　the　complex　thermal-solidification　history　during　the　laser　melting　deposition.　During　laser　deposition　of　titanium　alloy,　the　laser　beam　forms　a　melt　pool,　where　the　near-α　and　α+β　alloys　transform　into　a　single　β-phase,　followed　by　rapid　solidification.　This　process　is　repeated　when　a　successive　layer　is　deposited,　where　the　previously　deposited　layers　are　re-melted.　These　thermal　cycles　can　affect　the　parent　microstructure　in　the　previously　deposited　layers.　It　was　identified　from　the　results　that　the　width　of　α-laths　was　larger　in　the　regions　near　the　top　of　the　build　component.　In　comparison,　the　bottom　region　near　to　substrate　contained　fine　laths　due　to　a　steep　thermal　gradient　and　repeated　thermal　effect.　The　volume　fraction　of　β-phase　was　higher　in　the　bottom　region,　which　could　be　regarded　as　the　transformed　β　matrix　due　to　the　successive　thermal　effect　in　the　α+β　field.　The　results　also　showed　shallow　porosity　existence　in　the　top　and　near　to　top　regions.　According　to　the　morphology　and　size,　the　formation　of　these　pores　can　be　attributed　to　the　gas　entrapment　during　the　deposition　process.　©　2021　Institute　of　Physics　Publishing.　All　rights　reserved.