TA18 titanium alloy tube has specific radial basal texture due to the requirement of its service environment and the annealing temperature is one of the important factors. In order to reveal the formation mechanism of annealing texture of the tube. In this paper, Ф8×0.6 mm the cold rolled tube and the annealed tube at 450, 500, 550, 600, 650, 700, 750℃/3h were selected as experimental materials. Studied the grain orientation characteristics of the tubes at different annealing temperatures by electron backscatter diffraction (EBSD). As a result, the cold rolling tube had great radial basal texture and <10-10> direction was mainly parallel to the axial direction of tube. The grain recovery, recrystallization and growth occurred at annealing temperature 450-550℃,550-650℃,650-750℃ respectively and the transformation of texture occurred during the stage of grain recrystallization and growth. With the occurrence of recrystallization, the radial texture of tube was enhanced and the <11-20> direction was mainly parallel to the axial direction. The main cause of radial texture enhancement is that the fine grain of original cold rolling tube had more obvious radial orientation than the matrix, and the crystallization grain was prior to nucleation and growth around the fine grain and obtained strong radial orientation. During the following process of grain growth, the grain with strong radial orientation can grow dominantly, so that the tube can perform obvious radial distributed ‘recrystallization texture’.