Assertion: titanium | /r/ObjectUse | used in propeller shafts
Facets:
Source sentences:
text: Titanium has outstanding corrosion resistance to seawater, and thus is used in propeller shafts, rigging and other parts of boats that are exposed to seawater.
text: Titanium is not easily corroded by sea water and is used in propeller shafts, rigging and other parts of boats that are exposed to sea water.