T'iksu (Quechua for inclination or motion to one side, obliqueness, slant, hispanicized spelling Ticsho) is a volcano in the Andes of Peru, about 3,860 metres (12,664 ft) high.[2] It is situated in the "Valley of the Volcanoes" in the Arequipa Region, Castilla Province, Andagua District.[3] T'iksu lies south-west of the volcano Puka Mawras and west of the volcano Yana Mawras.