In Ti‐Cr alloys containing both the Laves phase (ordered TiCr2) and the &bgr; phase (bcc solid solution), 1 MeV Kr+irradiation at temperatures <250 K amorphizes the Laves phase but not the &bgr; phase. The irradiation‐induced amorphous material transforms into polycrystalline &bgr; upon warming to room temperature. In contrast, irradiation at room temperature causes the &bgr; phase to grow by migration of the &bgr;/Laves interface; no change in local composition across the migrating interface is observed. The &bgr; phase also grows during prolonged irradiation at 100 K, but the velocity of the &bgr;/amorphous interface per unit calculated atomic displacement rate is more than three orders of magnitude lower than that of the &bgr;/Laves interface at room temperature. An interpretation of this new type of irradiation‐induced phase transformation is presented in terms of displacement cascade formation and dynamic recovery at the structural interface that exists between the two phases.