This topic pertains to the weight room, but here are the two definitions and you decide for yourself:
Technical Failure: When an athlete is unable to perform a repetition with perfect form successfully.
Failure: When an athlete is unable to perform a repetition successfully.
The difference: with perfect form
From working in great weight rooms over the years, I have learned that completing repetitions just to reach a certain number and not actually working on completing them with good form is not ok! However, just recently was I introduced to a name for this comparison courtesy of a Mike Boyle presentation. Exercises are meant to be performed a certain way and any deviation from the correct model is a technical failure to me and the exercise should be stopped and the weight dropped immediately (some of you think I'm kidding right now) for the remainder of the session to be re-evaluated in a future session. Please keep this in mind if you are controlling any weight training sessions for the team, do not risk injuries with those you are working with.