I recently saw a company selling titanium plates with a linex type coating similar to AR500 armor. I knowing that spall is a issue when it comes to standard steel plates. I also know that titanium muzzle devices tend to send showers of sparks when they are used on carbines. My questions are is spall as much or more of a issue with titanium as steel? Do they have any advantage over ceramic or HDPE armor? Is this just expensive anake oil?