BTI or Bti may refer to:

;Acronyms

  • Bacillus thuringiensis israelensis (Bti), a bacterium
  • Barisan Tani Indonesia
  • Baron Tornado Index of tornado probability
  • Before the Impact, an American TV series
  • Beverage Testing Institute
  • Bicycle Technologies International, Santa Fe, New Mexico, US
  • Boston Theological Institute
  • Boyce Thompson Institute for Plant Research, Cornell University, Ithaca, New York, US
  • Branch Target Identification, an AMD technology for mitigating computer security exploits;
  • Branch Target Injection or Spectre variant 2, a security vulnerability
  • Breaking the Impasse, an Israel-Palestinian group
  • Breed Technologies, Inc., now known as Joyson Safety Systems
  • Btrieve Technologies, Inc.
  • Because the Internet, the second studio album by American singer Childish Gambino

;Codes and symbols

  • Barter Island LRRS Airport, Alaska, US, IATA airport code
  • British American Tobacco PLC, NYSE symbol
  • The ICAO designator of the Latvian flag carrier, AirBaltic.