| Acronym | Meaning |
| LTI | Leadership Training Institute |
| LTI | Left Thumb Impression (personal identification) |
| LTI | Limited Technical Inspection |
| LTI | Live Training Instrumentation |
| LTI | Longtime Integration |
| LTI | Lost Time Incident |
| LTI | Louisiana Technical Institute |
| LTI | Lower Tactical Internet (battlefield communications network for echelons at brigade and below) |