The　scientific　issue　was　investigated　for　the　spherical　mechanisms　of　α　phase　in　near　α　titanium　alloy　with　erbium,aimed　to　preparate　the　α　phase　with　random　crystal　orientation.　A　novel　high　temperature　titanium　alloy　with　erbium　was　studied　to　clarify　the　micro-structural　evolution　on　the　thermal　mechanical　conditions.　Meanwhile,the　micro-structure　model　was　established　to　clarify　the　dynamic　and　static　spherical　mechanisms　of　α　phase.　During　the　thermal-mechanical　deformation,the　spherical　mechanism　of　lamellar　α　colony　was　the　continuous　dynamic　recrystallization,controlled　by　the　mechanical　rotation　of　the　sub-grain　followed　by　dislocation　climbing　and　annihilation　by　diffusion.　During　the　thermal　process,the　static　spheroidization　was　developed　on　basics　of　the　β　inserted　model.　During　the　thermal-mechanical　deformation,the　sub-structure　was　induced　by　the　interaction　between　the　slipping　dislocation　with　b　of　1　/　3[2112].　And　then,the　mis-orientation　was　increased　to　develop　to　the　dynamic　recrystallization.　During　the　thermal　process,the　static　spherical　process,the　equiaxial　αp　grains　and　retained　β　transformed　microstructures　were　prepared.　Furthermore,retained　β　transformed　microstructures　consisted　of　β　phase　and　secondary　αs　lamellar　with　the　thickness　of　30　nm.　©　2024　Cailiao　Daobaoshe/　Materials　Review.　All　rights　reserved.