The phase evolution in a calcium phosphate glass with the molar ratio [CaO]/[P2O5] < 1, to which 6.4 mol% TiO2 and 10 mol% Al2O3 were added as nucleation agents, was studied. The results indicate that the primary phase β-Ca2P2O7 is formed during surface nucleation and crystallization which are dominant at T < 930degreesC. No presence of metastable calcium phosphates was registered during the formation of the primary phase. The growth of beta-Ca2P2O7 crystals occurs on the faceted crystal/ glass interface with dendritic morphology at a crystal growth rate that is independent of time. The kinetics of beta-Ca2P2O7 crystal growth are characterised by a growth activation energy of E-a = 426 +/- 15 kJ/mol. The parameters of the unit cell of the beta-Ca2P2O7 phase decrease with increasing temperature. The secondary TiP2O7 and AlPO4 phases are formed by volume nucleation and crystallization. The temperature of the maximum nucleation rate was determined to be T-n = 690degreesC, and it is higher than the transformation temperature T-g. In the temperature interval T < 930&DEG;C secondary phases appear during long annealing times. At T > 930degreesC glass volume crystallization is dominant. (C) 2003 Kluwer Academic Publishers.