A precipitation method was used to prepare amorphous mixed zirconium-titanium phosphates with various titanium contents. In this way the acidic solutions of ZrOCl2.8H2O and TiCl4 in various ratios were rapidly mixed with a phosphoric acid solution under continuous stirring. The resulting precipitate, characterized as [ZrxTi/1–x//HPO4/2.n H2O] was contacted with water of ethanol, then washed to pH 3.0 and dried at room temperature. The samples were irradiated with -rays of a60Co source giving a 6.6×107 Gy total dose. The thermal, chemical and ion-exchange properties of irradiated samples were investigated.