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I have these profiled rectangle.
I need to Bend it around Z-axis (Face #2 need to go to right) thus angle between faces #1 and #2 be exactly 45 degress.

File:

enter image description here enter image description here

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This is rather easy to do.

Just add a Simple Deform Modifier.
Set it to Bend and select the right axis.
Enter the desired angle (it's 45° by default)

enter image description here

Note:
In this case bending along the Z axis doesn't work as expected.
To make it work, rotate the object's origin by -90°, or use an empty rotated by -90°.

enter image description here

Thanks to @lemon, @plem and @robin-betts for pointing that out.

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  • $\begingroup$ I did what you wrote and got another result. prntscr.com/qwt7tv $\endgroup$ – Plem Feb 3 at 11:33
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    $\begingroup$ @ᴊᴀᴄʜʏᴍᴍɪᴄʜᴀʟ I wanted to ask the same question. I did it as you did while Rect stand straight up, but could't achieve it when it lays as in my file at start. prntscr.com/qwthgm $\endgroup$ – Plem Feb 3 at 11:48
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    $\begingroup$ Personally I find all the Simple Deform variants much less confusing, when used with an axis/orientation Empty, rotating it, and sticking to one axis. The rules about which axis the deformation is measured along for a given deformation axis are not entirely consistent, as far as I can tell, through trial and error. $\endgroup$ – Robin Betts Feb 3 at 12:01
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    $\begingroup$ @ᴊᴀᴄʜʏᴍᴍɪᴄʜᴀʟ, have never been able to understand clearly the bending rules. I think there are questions about it here. But nothing totally satisfying. Practically, as we know what this is supposed to do, I'd say "just try rotating until the result is obtained". And yes, as Robin said this is easier using an empty as axis origin. $\endgroup$ – lemon Feb 3 at 12:01
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    $\begingroup$ @RobinBetts Thanks for the advice, I edited the answer accordingly :). $\endgroup$ – Jachym Michal Feb 3 at 12:38

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