Acco chain on one of our boats is now about 15 years old and still going strong. We replaced the badly rusted chain on our second boat
with Titan 5/16 G43 just over 2 years ago. It seems to be holding up well but during the past two years the boat
has only been at anchor
for weekends and the odd 7 to 10 day period. Not a rigorous test of longevity.
I initially declined the Titan chain but the supplier vouched for it and so far I have no reason to complain.