TI, ti, and variants may refer to:
A time zone is a region of the globe that observes a uniform standard time for legal, commercial, and social purposes.
Eldrick Tont "Tiger" Woods (born December 30, 1975) is an American professional golfer who is among the most successful golfers of all time, and one of the most popular athletes of the 21st century.
Tina Turner (born Anna Mae Bullock, November 26, 1939) is an American-born Swiss singer-songwriter, dancer, and actress.
Timur (Persian: تیمور Temūr, Chagatai: Temür; 9 April 1336 – 18 February 1405), historically known as Amir Timur and Tamerlane (Persian: تيمور لنگ Temūr(-i) Lang, "Timur the Lame"), was a Turco-Mongol conqueror.