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The Word wrapping function is not in title designer.
That's true, but wouldn't your source text have carriage returns/line feeds already in it? You can set the text to be left-, center- or right-justified and hit return while typing or reviewing the pasted text to make sure it fits horizontally on the screen.
As mentioned earlier, the title will automatically determine the correct scrolling speed for however many lines of text you end up with, so there isn't any complicated timing to deal with.
New Blue Titler Pro 1.5 comes with the subscription version but I don't see a fixed width (word wrapping) option for its text box. Newer versions have that, for example I have V4 and it has a Fit Text to Box Width
option. The current version is V7 and it's a hefty US$299 ($100 cheaper if upgrading from an earlier version) but that seems like an excessive cost to avoid hitting the Enter key a few dozen times.