The process of injection molding is one of the most common methods for producing articles from thermoplastic polymers (polyethylene, polypropylene, polystyrene, etc.) and composites on its basis. One of the main problems of this technology is products warping due to uneven cooling after removal from the mold. Nowadays there are many ways to minimize this effect. Typically, specially selected cooling modes of products are used. However, this significantly increases the duration of the manufacturing process and requires additional expenditures. The possibility of reducing warping effects by adding negative thermal expansion filler (ferroelectric ceramics) in thermoplastic material is studied theoretically in paper proposed. Such an approach would considerably simplify production technology and improve productivity. In this study, a 3D thermoelastic problem has been solved numerically using a finite element method. It is also considered that the product undergoes only thermal stresses, that is the external load to the body was not apply, and the mass forces were absent. Solution of 3D problem was obtained with the help of the finite element method. Numerical simulation of the real fan impeller made of polyethylene filled with dispersed particles of ferroelectric PZT (a solid solution of lead titanate – lead zirconate Pb(Ti,Zr)O) was carried out. It was assumed that the filler particles have a granular shape and randomly distributed over the matrix volume, so this composite is macro isotropic initially. Several variants differing in filler concentrations were considered. To quantify the degree of thermal warping of the fan impeller, the ratio of the maximum displacement of the fan rim from initial configuration to its diameter (thermal warping factor, K ) was used. It was established that for this particular geometry complete compensation of warping is possible even at a 25% filler fraction. At higher concentrations, the picture was the same.The investigation shows that negative thermal expansion filler could be used to reduce the warpage of complex-shaped parts as they cool.