To produce materials based on the P2O5–CaO–TiO2 system, we have prepared film-forming solutions of four compositions, containing 70, 75, 85, and 95 wt % titanium(IV) oxide. The suitability of the filmforming solutions for film growth has been shown to be limited to viscosity values in the range from 3.4 to 3.7 mm2/s. At 70 and 75 wt % titanium(IV) oxide, a CaTiO3 (perovskite) phase has been identified in the P2O5–CaO–TiO2 system. The most uniform deposition of particles, with a large number of open pores after immersion in simulated body fluid (SBF), has been observed at 70 and 75 wt % titanium(IV) oxide. These compositions are thus the best suited for practical application.