According　to　the　principle　of　＇critical　moly　equivalence　and　multicomponent　strengthening＇,　a　new　type　metastable　beta　titanium　alloy　with　high　strength　was　designed,　and　the　tensile　properties　at　room　temperature　and　microstructure　on　hot　rolled　bar　(phi　12　mm　similar　to　20　mm)　of　this　alloy　under　different　heat　treatment　conditions　were　studied.　Compared　with　traditional　metastable　beta　titanium　alloys,　it＇s　ageing　response　is　fast,　the　distribution　of　dispersion　phase　is　uniform,　the　hardening　effect　is　high　and　no　precipitate-free　regions　have　been　found　during　high　tempertaure　ageing　treatment.　Solution　treatment　below　beta　transus　followed　by　ageing　is　suitable　for　keeping　high　plasticity.　In　this　case,　excellent　strength/plasticity　properties　can　be　achieved　(UTS:　1　200　MPa　similar　to　1　500　MPa;　EL:　8%similar　to　18%)　by　500,C　similar　to　600　degrees　C　aging　treatment.　However,　much　higher　strengthening　effect　can　be　obtained　by　direct　ageing　on　hot　rolled