The traditional low-alloy steel rose-bow spring of subway pantograph is easily occurred the corrosion and fracture after being used for a central period of time, which interrupts the train current collection and cannot provide power for the train, as a result of the interruption of the normal operation of subway trains. Therefore, an optimal design and improved processing technology for the rose-bow titanium alloy spring of subway pantograph was studied in this paper. The heat treatment tests on the two titanium alloy springs, made of TC18 and TB6 materials, were conducted respectively. The improved process flow of the rose-bow titanium alloy spring was also determined. Fatigue test results show that both TC18 and TB6 titanium alloy springs of pantograph can meet the corresponding requirements.