Warm up weights kind of depend on your strength level.
I have two 10lb training plates that are the same diameter as 45lb plates. Should I always start my 2 warm up sets with the 10's on so for a total of 65lbs? Or should I at some point transition to a 135lb warm-up?
Is the 135lb warm-up more import for when you do not have lighter same sized diameter plates?
Warm up weights kind of depend on your strength level.
Depends on what you're lifting for your work set.
The idea is to start your warmups with a weight that's the right height off the floor, and also very light for you.
I've started with 135 for deadlift warmups since my work sets got over 225.
I don't do 2 sets at 135 either -- I'm already warm from squatting, so I just do:
135 x5
185 x2
singles at 40-50lb jumps up to work weight
When it isn't taxing enough to affect your workset.
I was pulling (kg) 20x10 60x5 80x3 100x1 120x1 130x1 140x1 until recently, now I skip the 80kg set and just do 60x5 100x1 120x1 etc.
I will often do about ten reps with an empty bar, just to make sure all my joints move and nothing breaks.
The important part of the warm up is that it gets you warmed up. Get the body moving as it should and then get the feel of the heavier loads in steps that work for you.
At some point you will be too impatient to swap plates and will consider 135lbs light enough for a set of five with no adverse consequences. If you do this too soon, the worst that will happen is that you might miss a rep on the workset and then you will know what to do next time.
Day 1 if you're a healthy male under 55
Depends on your work weight. If you're pulling 135 as your work set, I wouldn't start there to warm up. But, if you're pulling 315 or something, then yes. Even when I pull a heavy set at 505, I pull 135 from the floor as my first warmup.