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A novel cobalt base superalloy containing titanium and aluminum was investigated through metallography, tensile test, and high-temperature isothermal compression deformation. The results show that proper content of titanium and aluminum with can improve the strength and ductility of the cobalt base superalloy. The Co3(Ti,Al) compound with L12 structure precipitates when the novel superalloy is aged at 800℃ for 20h. The ε phase with hcp structure also precipitates when the superalloy is deformed by 28% and then aged at 650℃ for 4h. The ε phase can exist at 800℃. The superalloy has excellent high-temperature mechanical properties. Its maximum flow stress at 850℃ is in the range of 360-475MPa when the strain rate is between 0.0021 and 2.1 s-1. The flow stress of the superalloy during high-temperature deformation can be described by the Zener-Hollomon parameter with a hot deformation activation energy of 397 kJ.mol-1.