Unity Asset Store – Material Timeline Track v1.0

Use Timeline to blend material properties.

The package includes two custom tracks:

* The Material Track edits properties of a material directly, changing it everywhere in the scene.

* The Renderer Track overwrites a selection of a renderer's material slots, thus changing only one specific object. Material Property Blocks are used, so instancing isn't broken.

https://assetstore.unity.com/packages/tools/animation/material-timeline-track-207256