Assertion: titanium's ore | /r/HasProperty | various
Facets:
Source sentences:
text: The currently known processes for extracting titanium from its various ores are laborious and costly; it is not possible to reduce the ore by heating with carbon (as in iron smelting) because titanium combines with the carbon to produce titanium carbide.
text: This is ostensibly because the process of extracting titanium from its various ores is laborious and costly.