The effective biaxial modulus (M-eff) and strain energy density (W) of cubic polycrystalline films with ideally (h k l) fiber textures are estimated using Vook-Witt (VW) grain interaction model and the data are compared with those derived from Voigt, Reuss and Voigt-Reuss-Hill (VRH) models. Numerical results show that the VW average of M-eff for ideally (100)- or (111)-fiber-textured films is identical to the VRH average of M-eff. For (110) and (112) planes, however, the VW average of M-eff for (110)-fiber-textured film is larger than that of (112)-fiber-textured film when the Zener anisotropic factor (A(R)) is not equal to 1. Furthermore, M-eff and Wexhibit incremental tendencies with the increase of the orientation factor (Gamma (h) (k) (l)) for the [h k l] axis when A(R) > 1, implying that M-eff and W have the minimums on the (100) plane. Reversely, M-eff and W decrease with the increasing Gamma (h) (k) (l) when A(R) < 1. This means that M-eff and W on (111) plane have the minimums. (C) 2008 Elsevier B.V. All rights reserved.