[en] The recrystallization of polycrystalline pure titanium has been studied ''in situ'' and in real time by Synchroton White Beam X-Ray Topography. Synchrotron X-ray topographs made at different temperatures allow us to determine that in addition to the well known recrystallization in the α phase, two other ones were occuring when the samples were annealed through the phase transformation point upward (in the β phase) and downward (in the α phase). The recrystallization proces and the crystalline quality of the grains have then been determined. (author)