The immobilization of strontium over titania was carried out by the method of coprecipitation. From a preliminary study, an appreciable uptake (52.8%) of Sr-90 was observed over preformed titania material. A weighable amount of strontium was coprecipitated with Ti(IV) hydroxide and a maximum of similar to 34 wt% Sr was found to be adsorbed. The leachability of the mixed materials prepared by the addition of 250 and 400 mg Sr2+,calcined at 1000 degrees C, by soxhlet apparatus refluxing at 97 degrees C and repeated seven times at intervals of 24h, was found to be of the order of 10(-9) and 10(-5) g cm(-2) d(-1), respectively. X-ray powder diffraction analysis revealed that strontium was immobilized in the crystalline matrix of rutile, which suffered some structural changes with the formation of new phases, SrTiO3 + Sr2TiO4 and SrTiO3, respectively.