TI
- Bonnie Nettles
- Cabbage tree (New Zealand)
- Cordyline
- Cordyline banksii
- Cordyline fruticosa
- Cordyline indivisa
- Cordyline obtecta
- Cordyline pumilio
- Di (disambiguation)
- Fifth Dynasty of Egypt
- T.I.
- T1 (disambiguation)
- TI (cuneiform)
- TI Group
- TI-class supertanker
- TL (disambiguation)
- Tailwind Airlines
- Tamgha-e-Imtiaz
- Telecom Italia
- Tenant inducement
- Texas Instruments
- The International (Dota 2)
- Therapeutic index
- Therapeutics Initiative
- Thursday Island, Torres Strait
- Ti (concept)
- Ti (prefix symbol)
- Ti, Oklahoma
- Tiberius (praenomen)
- Ticino
- Tiger Inn
- Tigrinya language
- Titanium
- Toastmasters International
- Tol Air
- Topological insulator
- Transparency International
- Treasure Island Hotel and Casino
- Truncated icosahedron
- Twilight Imperium
- Týr
- Wade–Giles