A　new　type　of　Ti-Al-Sn-Zr-Mo-Si　series　high　temperature　titanium　alloy　was　prepared　by　a　water-cooled　copper　crucible　vacuum　induction　melting　method,　and　its　phase　transition　point　was　determined　by　differential　thermal　analysis　to　be　Tβ　=　1017　℃.　The　influences　of　solution　temperature　on　the　microstructures　and　mechanical　properties　of　the　as-forged　high　temperature　titanium　alloy　were　studied.　XRD　results　illustrated　that　the　phase　composition　of　the　alloy　after　different　heat　treatments　was　mainly　α　phase　and　β　phase.　The　microstructures　showed　that　with　the　increase　of　the　solution　temperature,　the　content　of　the　primary　α　phase　gradually　reduced,　the　β　transformation　structure　increased　by　degrees,　then,　the　number　and　size　of　secondary　α　phase　increased　obviously.　The　tensile　results　at　room　temperature　(RT)　illustrated　that　as　the　solution　temperature　increased,　the　strength　of　the　alloy　gradually　increased,　and　the　plasticity　decreased　slightly.　The　results　of　tensile　test　at　650　℃illustrated　that　the　strength　of　the　alloy　enhanced　with　the　increase　of　solution　temperature,　the　plasticity　decreased　first　and　then　increased,　when　the　solution　temperature　increased　to　1000　℃,　the　alloy　had　the　best　comprehensive　mechanical　properties,　the　tensile　strength　reached　714.01　MPa　and　the　elongation　was　8.48　%.　Based　on　the　room　temperature　and　high　temperature　properties　of　the　alloy,　the　best　heat　treatment　process　is　finally　determined　as:　1000　℃/1　h/AC+650　℃/6　h/AC.　©　2021　Trans　Tech　Publications　Ltd,　Switzerland.