The dielectric properties of ternary silver vanadium tellurite and titanium vanadium tellurite glasses of the form [0.5[xAg(2)O-(1 -x)V2O5]-0.5TeO(2), x = 0.1-0.8 mol] and [0.5[xTiO(2)-(1 -x)V2O5]-0.5TeO(2), x = 0.1-0.6 mol] are investigated as a function of frequency (10 Hz-1 MHz) and temperature (70-425 K). Electrical relaxation is analyzed in terms of dielectric modulus and Kohlrausch-Williams-Watts (KWW) stretched exponential distribution function. The composition dependence of the stretched exponential parameter (beta) is explained according to the variation of activation energy for dc conductivity and inter-charge separation in the two glass series. From the transition of polaronic to ionic conduction in silver vanadium tellurite glass series, it is established that ion-ion correlations are more effective in slowing down the electrical relaxation than the interactions between electronic charge carriers. (C) 2010 Elsevier B.V. All rights reserved.