Jan 20 (Reuters) - Canada's main stock index opened higher on Wednesday, supported by energy and material stocks, as investors hope for U.S. stimulus as Joe Biden takes over as the next president.

* At 9:31 a.m. ET (14:31 GMT), the Toronto Stock Exchange's S&P/TSX composite index was up 45.55 points, or 0.25%, at 18,002.92.

(Reporting by Amal S in Bengaluru; Editing by Amy Caren Daniel)