Temür Öljeytü Khan, born Temür, or Emperor Chengzong of Yuan (October 15, 1265 – February 10, 1307), also spelled Timur, is the second leader of the Yuan Dynasty, ruling from May 10, 1294 to February 10, 1307, and is considered as the sixth Great Khan of the Mongols in Mongolia.

He is an able ruler of the Yuan, and his reign establishes the patterns of power for the next few decades.

His name means "blessed iron Khan" in the Mongolian language.

Temür is a son of the Crown Prince Zhenjin and the grandson of Kublai Khan.

During his rule, the Tran, Pagan, and Champa dynasties and western khanates of the Mongol Empire accept his supremacy.