| WTI | Waiting Time Initiative 
| Others |
| WTI | Wall Thickening Index
| Others |
| WTI | Washington Technical Institute (now the University of the District of Columbia)
| Others |
| WTI | Water Technology Inc
| Others |
| WTI | Weapons and Tactics Instruction
| Others |
| WTI | Weapons And Tactics Instructor
| Others |
| WTI | Weapons Tactics Instructor
| Others |
| WTI | Weapons Training Instruction
| Others |
| WTI | Web Traffic Intelligence
| Others |
| WTI | West Texas Intermediate
| Others |
| WTI | West Texas Intermediate (oil)
| Others |
| WTI | Western Technology Investment
| Others |
| WTI | Western Telematic, Inc.
| Others |
| WTI | Western Transportation Institute
| Others |
| WTI | Wetland Training Institute, Incorporated
| Others |
| WTI | What a Terrible Institution
| Others |
| WTI | Why The Impotence
| Others |
| WTI | Wichita Technical Institute
| Others |
| WTI | Wincity Trade, Inc.
| Others |
| WTI | Winding Temperature Indicator
| Others |
| WTI | Windle Trust International
| Others |
| WTI | Wing Tip Index
| Others |
| WTI | Wire Thread Insert
| Others |
| WTI | Wireless Technology Inc
| Others |
| WTI | Withlacoochee Technical Institute
| Others |
| WTI | Work Time Initiative
| Others |
| WTI | Working Toward Independence
| Others |
| WTI | World Technology Ingredients
| Others |
| WTI | World Trade Institute
| Others |
| WTI | WORLDPAC Training Institute
| Others |