| Acronym | Definition |
|---|
| TIG | Tungsten Inert Gas (Welding) |
| TIG | Takingitglobal |
| TIG | Travail d'Intérêt Général (community service) |
| TIG | Topical Interest Group |
| TIG | Technology Implementation Group |
| TIG | Time In Grade |
| TIG | Trends in Genetics (journal) |
| TIG | Tetanus Immune Globulin |
| TIG | Technology Integration Group |
| TIG | The Inspector General |
| TIG | Trust In God |
| TIG | Technology Implementation Group (AASHTO) |
| TIG | The Imperial Guards (gaming guild) |
| TIG | The Internet Guide (course) |
| TIG | The Image Group (various organizations) |
| TIG | Topten International Group (France) |
| TIG | The Initiative Group (various locations) |
| TIG | Technical Interest Groups |
| TIG | Technology Initiative Grant (Legal Services Corporation) |
| TIG | Time of Ignition |
| TIG | Technology Infusion Guideline |
| TIG | Terminal Internet Gateway |
| TIG | Technology Initiatives Game |
| TIG | Tonight Is Goodbye (band) |
| TIG | Task Interaction Graph |
| TIG | Transmission Identification Generator |
| TIG | Technology Innovation Group, Inc |
| TIG | Theater Information Grid |
| TIG | Tactical Intelligence Group |
| TIG | Tax on Industrialized Goods |
| TIG | Técnica Industrial Guatemalteca (Spanish: Guatemalan Industrial Technics; Guatemala) |