DTI
DTI may refer to:
Science and technology
- Deep trench isolation; See Shallow trench isolation
 - Dial test indicator
 - Direct trader input, in the history of electronic data interchange
 - Diffusion tensor imaging, a structural magnetic resonance imaging technique
 - Direct thrombin inhibitor
 - Diesel turbo injection, a brand name for common rail
 - Direct tension indicator
 - Deep tissue injury, see suspected deep tissue injury in List of medical abbreviations: S
 - Dye transfer inhibitor
 
Organizations
- Defence Technology Institute, the Thai defence technology public organisation
 - Department of Trade and Industry (disambiguation), a government department in several countries
 - Detroit, Toledo and Ironton Railroad
 - Diversified Technology, Inc.
 - Directorate of Terrorist Identities, responsible for the Terrorist Identities Datamart Environment
 - Display Technologies, Inc., a joint venture of IBM and Toshiba
 - DT Infrastructure, Australian construction company
 
Other uses
- Debt-to-income ratio, in the mortgage industry
 - Dress to Impress, a video game on Roblox