WTI
- Berta language
- United States Marine Corps Training and Education Command
- WT (disambiguation)
- WT1 (disambiguation)
- WTL (disambiguation)
- Ward–Takahashi identity
- Waterloo station (Indiana)
- West Texas Intermediate
- Western Transportation Institute
- Wildlife Trust of India
- Winnersh Triangle railway station
- Witness to Innocence
- World Trade Institute
- World Tribunal on Iraq