Which Titan is known for holding the world on his shoulders?

The Titan known for holding the world on his shoulders is Atlas. In Greek mythology, Atlas is often depicted as a giant who bears the weight of the heavens, or in some interpretations, the Earth itself. This iconic image has made him a symbol of endurance and strength. The story of Atlas originates from the Titanomachy, the war between the Titans and the Olympian gods, during which he was punished for siding with the Titans by being condemned to hold up the sky.

Prometheus, another Titan, is famous for his act of stealing fire from the gods and giving it to humanity, as well as for enduring punishment from Zeus. Hercules, a demi-god and hero renowned for his strength and for completing the Twelve Labors, is sometimes depicted in stories involving Atlas but does not actually hold the world himself. Chronos, often confused with Cronos, is the personification of time and not related to the myth of Atlas.

Thus, Atlas is the definitive figure associated with the image of bearing the world, making this answer correct.