The effective biaxial modulus of fiber-textured cubic polycrystalline films with texture dispersion is estimated using Voigt-Reuss-Hill and Vook-Witt grain-interaction models. The orientation distribution function with Gaussian distributions of two Euler angles theta and phi is adopted to analyze the effect of texture dispersion degree on the effective biaxial modulus. Numerical results based on Cu and Cr fiber-textured films show that the distribution of angle phi has slight influence on the effective biaxial modulus of (0 0 1)-fiber-textured films if and only if the distribution of out-of-plane angle theta is narrow. Enhanced theta and phi distributions destroy the perfect fiber textures and as a result the films represent an evolution of ideal (h k l) fiber textures to nonideal or random textures with varying full widths at half maximums of theta and phi. (C) 2008 Elsevier B.V. All rights reserved.