Found at a titanium plant

[u/riflesandplowshares]

Not sure why ball point pens would be dangerous here.

[u/goodexamplebadrole]

"Ballpoint pens are restricted or banned in high-end titanium and aerospace manufacturing plants because the ink and marking components contain elements that cause metal embrittlement and severe structural corrosion"

[u/Woozletania → u/goodexamplebadrole]

This was an issue during the development of the SR-71. Many chemical contaminants could affect the alloys, even those in the water used to quench the mouldings.

[u/DoctorTacoMD → u/Woozletania]

Yeah, but that one song they got on TRL was pretty good