Abstract: TA2 plates made from EB furnace slab ingots were annealed at different annealing temperatures and the resulting microstructure and mechanical properties of the plates were studied by using metallographic microscope, mechanical properties and impact performance tests. The results show that as the annealing temperature increases, the deformed stripe α grains in the metallographic structure gradually decrease and disappear, and a small amount of fine recrystallized grains appear. At the annealing temperature 800 ℃, the grains are obviously equiaxed. When the temperature is 850-900 ℃, the recrystallized grains in the central part are fuzzy, and the longitudinal grains are smaller and more uniform than the horizontal grains.As the annealing temperature increases, the mechanical strength of the sheet shows a trend of first decreasing and then increasing, and the trend of plasticity is opposite to that of strength.The strength is the highest after annealing at 900 ℃with the tensile strength of 570 MPa, the yield strength of 460 MPa, whereas the plasticity value is the largest when fully recrystallized at 800 ℃with the elongation of 28%. The impact toughness increases with the annealing temperature, which presents a first increase and then decrease trend with the maximum value of 203 J/cm² at 800 ℃.