Selective　laser　melting　(SLM)　process　belongs　to　a　layer-by-layer　additive　manufacturing　technology,　which　has　different　temperature　gradients,　cooling　rates,　and　reheating　treatment　in　different　regions　due　to　the　variation　of　the　thermal　histories　for　different　layers　during　SLM　process.　This　work　aims　to　study　the　microstructural　homogeneity　evolution　of　β　phases,　such　as　size,　morphology,　distribution,　crystallographic　orientation,　and　phase　composition　in　different　regions　of　the　SLM　Ti-6Zr-5Fe　near　β　titanium　alloy.　The　results　indicate　that　the　microstructure　in　different　regions　of　SLM　Ti-6Zr-5Fe　alloy　sample　is　quite　different.　The　β　phase　in　the　bottom　area　had　the　smallest　size　about　7.25　μm,　the　β　phase　in　the　side-top　area　had　the　largest　size　about　20.56　μm.　The　β　phase　in　the　side-middle　and　middle　part　had　a　lower　aspect　ratio　of　1.52　and　1.59,　the　β　phase　in　the　side-bottom　and　top　part　had　a　larger　aspect　ratio　of　1.93　and　1.92.　Most　of　the　β　phase　in　the　side-bottom　and　top　part　had　the　〈001〉　crystal　orientation　towards　build　direction　and　laser　moving　direction,　the　texture　type　in　other　regions　was　random.　The　α　phase　in　the　top　of　the　SLM　Ti-6Zr-5Fe　sample　had　a　smaller　size　than　that　in　the　middle　and　bottom　of　the　sample.　Meanwhile,　the　microhardness　in　the　top　of　SLM　Ti-6Zr-5Fe　sample　was　higher　than　that　in　the　middle　and　bottom　of　the　sample.　The　temperature　gradients,　cooling　rates,　and　reheating　treatment　play　different　leading　roles　in　different　regions　of　the　SLM　Ti-6Zr-5Fe　alloy　sample.　©　2020　Elsevier　Inc.