IPA: /ˈtaɪtəlˌhoʊldər/
KK: /ˈtaɪtlˌhoʊldər/
A person or entity that possesses a title, often in a competitive context, such as a champion in sports or a legal owner of property.
The titleholder of the championship defended their title successfully this year.
Titleholder → It is formed from "title" (from Old French *titule*, meaning a name or designation) and "holder" (from Old English *holdan*, meaning to keep or possess). A titleholder is someone who possesses or holds a title.
Think of someone who 'possesses' ('holder') a 'name or designation' ('title') — that's what a titleholder means.