替换 (tì huàn) is a verb meaning 'to swap out' or 'to replace'—especially when exchanging one physical object for another, often to restore function, update, or maintain something. The first character 替 (tì) conveys the idea of 'substituting' or 'standing in for', while 换 (huàn) means 'to exchange' or 'to change'. Together, they emphasize a deliberate, action-oriented replacement of one item with another, typically in practical, everyday contexts like maintenance, repairs, or upgrades.

This word is commonly used in instructions, technical manuals, and daily conversations about fixing or updating things—such as replacing a broken part, changing batteries, or swapping old equipment. It implies intentionality and equivalence: the new item usually serves the same purpose as the old one. Unlike 把…换掉 (bǎ…huàn diào), which is more colloquial and can imply discarding, 替换 carries a neutral-to-formal tone and focuses on the substitution itself rather than disposal.