I fixed the title for you.
If you use this BF Custom Search Engine and search "Forged in Fire" you will find many threads on the subject of how real the show is and the testing.
https://cse.google.com/cse/publicurl?cx=012217165931761871935:iqyc7cbzhci
I am sure I will get serious flack and probably some vitriolic emails for posting this reply to your question, but the below is my opinion.
I have coached three FIF contestants. They all had to make a sword. They knew the swords would be abused severely, so HT was done for max toughness and moderate hardness. The parameters for passing a FIF test are sort of like the ABS requirement on making a test knife that bends 90°. It isn't the best knife you could make, but shows the skills to make a knife/sword that will pass a test that would not be seen in normal use. In short, a beautiful screaming sharp Rc64 knife would fail miserably on FIF. A way too thick edged Rc58 ugly knife would pass well.
All that said, the handling of a sword by their martial arts expert DM usually shows what I would call poor handling. I have no doubt the DM knows how to swing a sword or knife, but the showmanship leads to poor movements and impacts. It is done for the camera and to make DM look like a cool ninja with a catch phrase - "Eet Weell Keel!". No disrespect to him, he is paid well for his performance, but I feel it is more a performance than a serious test.
On the episode Page Steinhardt won, his sword was so bad that it bent like it was made from taffy. The other sword was stuck against the target sideways and broke. Since Paige's sword was still intact, albeit severely bent, he won. In the case of another episode, it was brought up after shooting the final episode that DM had struck the target sideways with the loosing sword. Tapes were reviewed, and showed the winning sword hitting the target edge-on and the loosing sword hitting the target sideways. The producers said that was unfortunate, but the sword broke and there was no way to deal with the issue ... sorry.
It is my opinion that FIF isn't a real knife/sword making show, but a reality type show shot to create drama and suspense for the viewers. The contestants are real makers, just the camerawork, ridiculous sword shapes, crazy tests and materials, situations and locations for the smiths to work in, time restraints, and post production editing are all aimed to create a show with "WOW" effect that is not real.
Not part of your question, but I still wonder what they float on top of those barrels of quenchant to make that huge flash of fire. I have quenched knives and swords for 65 years in everything from motor oil to AAA and #50 and never seen that flash.