Simply put, reclassifying creatures that are artificial/constructed/mechanical, such as Titans, under 'Treasures and artefacts' as Artifact Creatures. They can still be the same, though I believe they would be looked at more as rare relics instead of an openly viable race.
I figure since some of the biological creations chlaena shapers can make are listed under artifacts, might as well make a section for the kinds of things that are similar to creatures, into their own sub-category.
Other things that can be put there are golems and a Felaryan version of gargoyles, etc.