The applications of Ti-doped sapphire (Т?rА?rОа) in femo-second ultra-fast and high-average-power laser system were described briefly. It is suggested that the growth of large-sized Ti:S^)phire with high optical properties is the key note in ultra fast and high power laser applications. The various growth methods of TiiAlA were reviewed, and the development of large-sized Тi:Аl2О3 with high quality is proponed in the end of this paper.