High-performance, fiber-reinforced composites are beginning to see significant commercial adoption due to their superior performance and light-weight attributes. These composites can be further enhanced by integrating multifunctional materials into the structure. In this research, an approach to creating a multifunctional fiber is developed utilizing a two-step hydrothermal reaction to synthesize a barium titanate nanowire film on carbon fiber while maintaining the fiber's mechanical strength. Barium titanate is a ferroelectric material so it is able to couple electrical and mechanical domains thus adding functionality to the carbon fiber. The ferroelectric properties of the nanowire film are characterized using a modified piezoelectric force microscopy technique resulting in an average d33value of 31.6 pm V-1 and an average d31value of -5.4 pm V-1. Power harvesting testing results in a resonant frequency at 52 Hz producing 16.4 mV under 0.5 g sinusoidal input acceleration. Therefore, the hydrothermal synthesis of a barium titanate nanowire film coated carbon fiber demonstrates the development of a structural multifunctional fiber that has power harvesting and sensing applications.