TTI
- Igloo Products Corporation
- TI (disambiguation)
- TTI Telecom
- TTI, Inc.
- TTIS
- Techtronic Industries
- Text-to-image model
- Time temperature indicator
- Toyota Technological Institute
- Toyota Technological Institute at Chicago
- Transfusion transmitted infection
- Transmission Time Interval
- Travel Technology Interactive
- Troubled teen industry
- Turbo Technologies