Yes, if you are patient enough, crushing and shaking periodically and allowing days of time can do the job as well.
I would not under any circumstances bake.
If desired, putting in a water bath that is at about 72 C (161 F) for a few minutes till the oil is likely heated to match, can be done. Inserting a syringe, with the plunger removed, to be present during the process will prevent expanded air from popping the stopper off, if that is relevant to the particular case.
However I don't bother with that.
Trenbolone oxidizes easily, so I would not use excessive heat, as I consider baking to be.
You might want to add the pasteurization (so to speak) step, as while my method gives really minimal exposure of the TA and oil to the environment (simply that of pouring the pellets in, directly from the cart, two rows at a time; and pouring the oil in), adding a crushing procedure will have the vessel used for mixing opened to the air for much more time. You still ought to be able to do it cleanly, but what with the extra exposure I suppose the pasteurization would be a nice thing to do.
If you would like to also be able to do the additions with so little exposure to the environment, a jewelry sonicator may well be much cheaper than a magnetic stir plate, and also works well. However some of them switch off automatically only after 5 minutes: it's a pain in the ass when that's the case as you may have to sonicate 20 times or some number like that.
As for what filter size to use, in principle 0.22 micron has the advantage that some bacilli have minor axis diameter smaller than 0.45 micron, so the 0.22 micron filter might stop more of these. However in practice I've used 0.45 micron almost every time for many years and never had an issue. It's harder to push through an 0.22 micron filter.
BA by the way is not considered to be bactericidal anyhow, only bacteriostatic, in other words, preventing growth. But there aren't the nutrients required for growth present in the solution anyway. Bacteria can't grow on only fat and steroids. It's more a problem, in my opinion, of not having live bacteria in there in the first place.
I don't myself prefer having any BA because even at the same moderate concentration of TA (50 mg/mL, the presence of BA adds to tren cough issues, at least in my experience. Not that it becomes an intolerably awful problem, but it's nice to have it be a very rare problem, as it is (for me anyway) with zero BA.