TTX

TTX may refer to:


 * Cessna 400 (also Cessna TTx), a single-engine aircraft
 * Tetrodotoxin, a neurotoxin discovered in aquatic animals
 * Tilting Train Express, a South Korean experimental train
 * Tinyatoxin, a highly irritant analog of resiniferatoxin and capsaicin
 * Trenitalia Tper, an Italian railway company
 * TTX Company, a railroad freight car provider
 * Mungalalu Truscott Airbase, IATA airport code "TTX"