The regularity of the tensile strength of SiC(Ti) fiber coated aluminium and heated at various conditions was investigated，by means of fiber strength testing method. By using an ultrasonic liquid infiltration processing, SiC(Ti)/Al preform wire was prepared successfully. The experiment results of fiber and preform wire strength testing，metal1ographic analysis and SEM observation showed that SiC (Ti) fiber had a good stability，and the wire strength came up to the ROM calculated level.