Stationary　shoulder　friction　stir　welding　of　Ti-6Al-4V　of　7　mm　thickness　was　conducted　with　varying　welding　speeds　and　rotation　speeds.　Variant　selection　analysis　was　carried　out　based　on　the　inherited　a　phase　texture　and　the　reconstructed　beta　phase　texture.　The　weld　surfaces　became　significantly　smoother　with　increasing　welding　speed　and　decreasing　rotation　speed.　Heat　input　decreased　greatly　with　increased　welding　speed　and　it　decreased　slightly　with　decreased　rotation　speed.　The　orientation　relationship　between　the　prior　beta　grains　was　measured　based　on　the　reconstructed　electron　backscattered　diffraction　(EBSD)　data.　Weak　Variant　selection　has　occurred　in　all　the　welds　because　most　of　the　prior　beta　grains　did　not　share　{110}　poles.　Strong　links　between　crystal　orientation　of　the　prior　beta　grains　and　hardness　have　been　found.　(C)　2017　Published　by　Elsevier　Ltd　on　behalf　of　The　editorial　office　of　Journal　of　Materials　Science　&　Technology.