Abstract:The TC4 bar with a diameter of 30mm for blades was prepared by radial forging. The microstructure, phase composition and texture of the bar from the edge to the center were tested by metallographic microscope, XRD diffractometer and electron backscatter (EBSD) technology. The effects of the microstructure and texture on the uniformity of mechanical properties and the level of ultrasonic flaw detection clutter were analyzed. The experimental results show that the internal grains of radial forging bars are fully refined, and the grain size gradually increases from the edge to the center. The transformed β lamellar structure is broken during radial forging. The bar contains a small amount of equiaxed β grains, which distribute in αp grain boundary and transformed β structure. The texture of the edge is {0001}<10-10>. The texture of the R/2 and the center is <10-10>//axial direction. The texture strength of the bar weakens gradually from the edge to the center. The coefficient of variation of tensile and yield strength of the bar are only 0.24% and 0.29%, which means the excellent uniformity. The level of ultrasonic flaw detection clutter of small size TC4 bars is ? 0.8-9dB, the clutter level is higher than the rolling bar. That is related to the change of crystal orientation in the non-uniform area of the microstructure of the radial forging bar.