One of Material Design's four transition patterns. A cross-dissolve (→ dissolve) overlaps the two screens, but fade through makes **the outgoing screen vanish first** and only then brings in the new one, which grows from about 92% to 100% for a touch of depth.
It is meant for screens with a **weak relationship** — bottom-nav tabs like Home / Search / Profile. It deliberately avoids implying spatial continuity; it only says "you moved to another peer screen."
Since nothing overlaps, text never ghosts through text. The cost is a brief empty moment in the middle, so keep the whole thing short (about 300 ms).
When to use
Use it for same-level switches such as bottom tabs or sidebar items. For hierarchy, use a push or shared axis.