the titanium needs good filtration because the sand is abbrasive to it.
on board a lot of heat exchangers are used with seawater , all types are present, like shell tube and plate. filtration is not done n ships (no room) however on land i would use a big pond to have the sediment out and maybe a filtration in series. The pond costs nothing and is a good filter.
Try to get the water as low as possible and upstream from the outlet. on board and in port we use starboard as intake and portside as outlet.