Abstract: A composite waterborne dispersion for 3D printing. The dispersion includes a composition containing an aqueous dispersion of polymer particles; an associative thickener; and a functional filler. The functional filler may be conductive particles, fumed silica, milled glass fibers, polydimethylsiloxane, eutectic metal particles, carbon fiber, thermally insulating particles, thermally conductive particles, ferromagnetic particles, particles with high acoustic impedance, low-k dielectric particles, or high-k dielectric particles. The composition has a yield stress >0 Pa, the yield stress being at least one of dynamic yield stress and static yield stress. The composition is film-forming when dried.