beta to alpha orientation of Ti

[yamaguchiShuh]

Hi, let me ask some questions about calculations of alpha-beta transformation following Burgers orientation relationship. I would like to calculate alpha phase orientation from beta phase. So, I coomand like following, but I got strange answers which mean Euler angles of phi2 are over 60 degrees although upper limit of phi2 of HCP (alpha phase) is 60 degrees. Please tell me why this happened and how I can solve it.

Best regrads
---------------------my command--------------------------

csBeta = crystalSymmetry('432',[3.3065 3.3065 3.3065],'mineral','Ti (beta)');
csAlpha = crystalSymmetry('622',[2.95 2.95 4.686],'mineral','Ti (alpha)');
beta2alpha = orientation.Burgers(csBeta,csAlpha)
oriParent = orientation.byMiller([0 0 1], [1 0 0], csBeta, ss);
oriChild = oriParent * inv(beta2alpha)
symmetrisedOrientations = oriChild.symmetrise("unique")