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.
The Tiananmen Square protests of 1989, commonly known in China as the June Fourth Incident (六四事件), were student-led demonstrations in Beijing in 1989. More broadly, it refers to the popular national movement inspired by the Beijing protests during that period, sometimes referred to as the '89 Democracy Movement (八九民运).
Eldrick Tont "Tiger" Woods (born December 30, 1975) is an American professional golfer who is among the most successful golfers of all time.