Will a stainless steel mesh screen scratch a titanium cup, or vice versa?I have a titanium french press and am thinking about replacing the included press with an all steel one. I am worried about little flakes of titanium or steel getting ground off into the coffee when the press slides in and out. The original press has a polyester cloth for a screen, so nothing scratches.
Steel is usually harder than titanium, at least when both materials are hear-treated to give their best strengths. And a harder material can scratch a softer one. So I imagine that the answer is that it will scratch. However much of the rest of your question is unclear and it may be that the amount of friction between the two is so small that no wear will take place, so there could be no problem. The function of the polyester cloth may be vital in reducing this friction, so that unless you keep this part of the original design, the scratching will become worse no matter which combination of metals are used.
