I should have immediately pointed out that I am not a metallurgist, and have no specific expertise based on experience. What is in the papers you are providing is my source on these issues, except for my lifelong experience with galvanized pipe, which isn't very brittle as a rule.

I very much appreciate your pointing out the noob error of confusing Celsius with Fahrenheit.

The steel in the Twin Towers was not galvanized. Even if the planes were made of solid zinc, they would not have so embrittled the towers as to cause collapse, because almost all of the heat from the explosions of the fuel was expended in less than one minute. There was no zinc to embrittle the steel,and the towers didn't collapse immediately, but only after significant time had passed, revealing that sudden embrittlement did not contribute to the collapse.

Absent thermite and thermate, and intentional demolition, the towers would not have collapsed. LME was not a significant factor in that demolition. In this last paper you have provided, steels beyond stainless are revealed to potentially be subject to LME. Regardless, unless you propose some mechanism by which the planes coated the internal structures of the towers in liquid zinc, and caused it to penetrate deeply into the 24" thick supporting members, LME could have played no part in the demolition of the towers on 9/11.

"...They found that most of the cracks were formed in the periphery area at the vicinity of the contacted area between the electrodes and TWIP steel sheets..."

LME is a highly localized phenomenon, and restricted to the surface of even sheet steel used throughout this paper. Such surficial effects would have had almost no effect on beams 24" thick.