Obsidian aliases are good for note titles when the titles is written in Kebab case as they can provide a version of the title without dashes between words. They can also be used to capitalise the letters of a proper noun, eg., [[obsidian]] will display Obsidian instead of obsidian.
Quartz uses the YAML title property to display page titles properly on The Quantum Garden Website, but inline titles are not substituted. A substantial code change would be required for this.