I looked it up , it says line of descent of a person , meaning the part of the family tree that goes down in a chain . Father to son to granddaughter . Get it now ? <| sep |> The properties of sintered metals compare well to the original mechanical properties . If you were to compare a piece of titanium produced using this method of manufacturing and compared it to , say , a solid piece of treated titanium the results would be very similar . Due to the high pressure and temperature seen in such a process , the powdered metal is able to achieve a density very close to that of ' pure ' titanium . This makes the process incredibly effective , but also means it is extremely expensive when producing parts such as this leg .