Thanks for that information. I can't understand why no one has tried with titanium. It should give lots of advantages. The duplex steels are stronger and harder to form and need lots of power. 50% more roughly according to spec sheets. Are the heading problems of that nature or are there other problems in forming?
Thanks for the suggestion to look at Kevlar. I hadn't considered it as I heard that costs were out of orbit for various fibres alternatives. Like 4 or 5 times the price of rod and having just now read the Navtec guide it says Kevlar has a requirement to replace at 6 years and to pull test every section, presumably more frequently than 6 years? Looks unattractive. Maybe there are competitive new long lasting carbon or kevlar fibre alternatives?
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