{HEAD ~ Such alloys} tend to have grains of {TAIL ~ excessive size} which can lead to brittle castings 
{ HEAD ~ Such alloys } tend to have grains of { TAIL ~ excessive size } which can lead to brittle castings
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH