Pultrusion is a technological process, where fibers impregnated with resin move through the heated die and solidify into composite profile with a constant cross section as in the metallic die. The quality of pultruded profiles is characterized by the value of the degree of cure, its homogeneity in the final product and by an absence of places, where the resin is overheated avoiding by this way its destruction. Different optimization methodologies have been developed and applied for the design of pultrusion processes producing rod, rectangular, C and I profiles. To improve effectiveness and productivity of conventional pultrusion process, preserving the quality of pultruded profiles, new optimization methodology based on the planning of experiments and response surface technique is applied for a production of high-quality corner profiles. This approach allows to execute temperature control in pultrusion process by the heaters switch-on and -off strategy and to estimate an influence of industrial shop temperature on the process effectiveness.