It has been shown previously that both ∆VV and the density of F centers produced by x irradiation of LiF at 80°K anneal out partially near 130°K. Upon reirradation at 80°K the F band quickly recovers while ∆VV does not recover. In the present study, an additional annealing stage of ∆VV and the F band was found near 270°K. Upon reirradiation at 80°K after annealing at 270°K, neither ∆VV or the F band recover in contrast to the recovery after annealing at 130°K. The irreversibility of the 270°K annealing of the F band indicates vacancy annihilation which apparently does not occur at 130°K. The formation of M centers at the higher temperature suggests vacancy motion. The fractional annealing at 130°K was found to be smaller than in previous work, presumably because of different sample perfection before irradiation.