  We study electron transport in composite ferroelectrics --- materials
consisting of metallic grains embedded in a ferroelectric matrix. Due to its
complex tunable morphology the thermodynamic properties of these materials can
be essentially different from bulk or thin-film ferroelectrics. We calculate
the conductivity of composite ferroelectrics by taking into account the
interplay between charge localization, multiple grain boundaries, strong
Coulomb repulsion, and ferroelectric order parameter. We show that the
ferroelectricity plays a crucial role on the temperature behavior of the
conductivity in the vicinity of the ferroelectric-paraelectric transition.
