By means of the selective trapping and two separated crossed ion beams at right angles, the ground low energy (electron volt) multiply charged Sc n+ (n=1～3) and Ti n+ (n=1～4) ions have been produced from refractory pure metal targets in a RF ion trap. The measured decay rates of Sc 3+ and Ti 3+ are 1.98 s -1 and 0.58 s -1 with the base pressure 5.6×10 -7 Pa, respectively.