The crystallite orientation distribution analysis was applied to the study of the development of the rolling textures in low‐carbon steels. It was found that the constraining effect of the grain boundary remarkably influences the rolling textures of polycrystalline iron. This enhances the crystal rotations, which would not be expected to occur in single crystals; and grains having the {110}〈112〉 orientations are forced to rotate about the 〈111〉axes lying in the sheet normal direction toward the {110}〈110〉 orientations. This is the origin of the 〈111〉 fiber texture normally found in the rolling textures of low‐carbon steels. The presence of the partial fiber texture having the 〈111〉 axes inclined 30 deg from the sheet normal toward the rolling direction could not be confirmed.