On the basis of titanium production practice, and by discussing selection principles of the reactor of reduction distillation in respects of size, configuration and material, it is reasonable to use a reactor with fineness ratio of 2:1, and with double flanges in favor of reducing iron content. Homemade ZG35Cr24Ni7SiN or ZG35Cr28Ni16 model steel should be available for producing a proper reactor.