Abstract:The influence of finish rolling temperature on yield behavior in ultra purified ferritic stainless steels stabilized with titanium has been investigated. The hot rolled bands, which were finish rolled at high and low temperatures, were annealed and cold rolled in the same processes. And two final sheets with different finish rolling temperature were obtained. The final sheet at low temperature finish rolling exhibits a markedly reduced Lüders elongation of only about 0.5%, a decrease of about 66.7% over that at high temperature finish rolling during tensile testing. Through investigation by using optical microscopy observations, X-ray diffraction measurements, internal friction measurements and transmission electron microscopy observations, the results showed that low temperature finish rolling resulted in the refined rolling and annealing microstructure as compared to high temperature finish rolling; Low temperature finish rolling promoted the formation of a large number of fine TiC precipitates and reduces in large amount of interstitial atoms in solid solution, resulting in the much reduced Lüders elongation. These results have been confirmed by the internal friction measurements.