Titanomachya (named after the Titanomachy of Greek mythology) is an extinct genus of titanosaurian sauropod dinosaur from the Late Cretaceous La Colonia Formation of Argentina.

The Titanomachya holotype specimen, MPEF Pv 11547, was discovered in sediments of the La Colonia Formation near the Cerro Bayo mountain and Bajada del Diablo crater in Chubut Province of Patagonia, Argentina.

The generic name, Titanomachya, alludes to the mythological Greek Titanomachy—the battle where the Olympian gods fought and defeated the Titans—referring to the species' proximity to the extinction of the titanosaurs.

The specific name, gimenezi, honors Olga Giménez and her paleontological contributions to the study of Argentinian dinosaurs from Chubut Province.

The holotype specimen was an adult similar in size to some related saltasaurids (Neuquensaurus and Saltasaurus), but it may have weighed more, as indicated by an astragalus modified for improved weight-bearing.