Answer:
Step-by-step explanation:
Lead is one of the heaviest metals, but it's less valuable than titanium, which is one of the lightest metals.
Or
Lead is less valuable than titanium because while Titanium is one of the lightest metals, Lead is one of the heaviest metals.
Or
While titanium is one of the lightest metals, lead is one of the heaviest metals, but lead is less valuable than titamium.