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Titanium Washers - ideal for spreading the surface load. Strong, lightweight and highly corrosion resistant. titanium flat washer for use in marine environments and chemical-processing plants. They may be mildly magnetic.
Titanium Flat Washers are designed to enhance the load-bearing capabilities of a threaded fastener and are compatible with a large range of screws.
As versatile components, they provide a number of uses including spacing, pre-load indication and wear-protection.
link:https://www.hst-titanium.com/titanium-forging/titanium-flat-washer-din-125.html
Titanium Flat Washer DIN 125