Thomas M. Franks was named head of global equity research at TIAA-CREF, said Jim Tolve, spokesman. He replaces Susan E. Ulick, who was named head of equity investments in April. The previous equity investment chief, Scott Evans, became CIO of TIAA-CREF. Mr. Franks will continue as managing director and equity analyst for CREF Investments while a replacement is sought. Mr. Tolve could not say when a selection might be made.