This document summarizes an investigation into the mechanical behavior of sintered copper-15% tungsten nano powder composites during cold forming. Copper and tungsten powders were milled to a particle size of 400nm and below and compacted into cylindrical preforms with initial densities of 85% and aspect ratios of 0.4, 0.6, and 0.8. The preforms were sintered and then subjected to cold deformation testing. Results showed that stresses increased with strain levels and aspect ratio, with lower aspect ratios exhibiting higher stresses. Fractional density was also found to correlate with a strain parameter according to a power law relationship.