A　new　metastable　beta　titanium　alloy　of　Ti-Al-Mo-V-Cr-Fe-Zr-Sn　system　was　designed　and　named　Ti-B20.　In　order　to　investigate　the　aging　properties　and　microstructures　of　the　new　alloy-subjected　to　different　solution　treatments,　the　tensile　and　Vickers　hardness　tests　were　carried　out　and　the　optical　microscope　and　scanning　electron　microscope　analysis　were　performed.　The　results　show　that　the　new　alloy　displays　rapid　aging　response,　high　age　strengthening　effect　and　fine　deposition.　In　addition,　beta　solution　results　in　ultra　high　age　hardening　effect　with　low　tensile　ductility,　whereas　excellent　combination　of　aging　strength　and　ductility　can　be　obtained　after　solution　treated　below　beta　transus　temperature.