Temporary tiddlers are tiddlers that will be discarded when TiddlyWiki is saved. Under default configuration of the SavingMechanism (more specifically, the filter in $:/core/save/all), these are tiddlers prefixed with $:/temp/. This prefix makes them SystemTiddlers as well.

One example usage of temporary tiddlers is storing the search queries. The query typed in the $:/AdvancedSearch is stored in $:/temp/advancedsearch.