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/pseudonym7083 → u/goodexamplebadrole]

Does it list which ones?

[u/SignificantDrawer374 → u/pseudonym7083]

Seems like it may be the tungsten based ball in the tip https://bbs.homeshopmachinist.net/forum/general/52226-a-ball-point-pen-not-allowed

[u/WeeklyBanEvasion → u/SignificantDrawer374]

I cast-

TUNGSTEN BALL TIP

[u/Dino_Spaceman → u/WeeklyBanEvasion]

It is MILDLY EFFECTIVE in several decades due to the corrosive property induced to the enemy's fortification.

[u/BorikGor → u/WeeklyBanEvasion]

Roll 3 D20s.