At present, the hardness of AT900L medium rod is between AT900tour and AT900power. Harder than AT900T and softer than AT900P.
On the style of play, AT series are all backcourt rackets, and the racket head is equipped with film and mesh titanium armor, which makes it easier to smash when you swing and pull down. As for the crash problem, it can be said that none of the players who answered you online have seen it, but it is hearsay and misinformation. Let me explain to you why some people pass it like this. AT series rackets are all made of titanium, which belongs to metal, so the ductility of metal is not very high. When playing doubles, it is easy to break or crack once you bump. The nonmetal (with good toughness) and metal make the counterweight heavier, the rigidity and toughness are integrated, and the tension of the racket is better. So the advantages outweigh the disadvantages!
I am Xi 'an's physical store, one of the top ten stores in China. I worked for three years and watched countless shots. Any carbon fiber beat will be interrupted, and there is no problem that at series beats are easy to break, collapse or flatten.