The microstructure, texture, room temperature and superplastic properties of the Ti-64 sheets with submicrocrystalline (SMC) structure were investigated. For evaluate the superplastic performance of submicron-grained sheets the tensile tests were carried out in the temperature range of 600-800degreesC. Submicron-grained sheets possessed a strong basal texture and isotropic mechanical properties in the rolling plane, higher yield strength and ultimate tensile strength than that of commercial sheet. At exceptionally low temperature range of 650-750degreesC the submicron-grained sheets demonstrated enhanced superplastic properties, which are defined as an initial flow stress of 15-30 MPa and about 1000% elongation at the strain rates of 3x10(-4)-7x10(-4)/s and temperature of 750degreesC. At the same time, the flow stress increased considerably due to grain growth during deformation at low strain rates and deformation temperatures above 700degreesC.