Noun
title case (uncountable)
(publishing, computing) The capitalization of text in which the first letter of each major (important) word is set as a capital.
Examples
This Sentence Is Written in Title Case, Which Some Publishers Call Headline-Style Capitalization; Articles (i.e., a, an, the) Are Not Capitalized Unless They Begin the String; Whether to Capitalize Prepositions (e.g., from, to, between) Is Not Universally Standardized But Rather Depends on Each Publisher's House Style.