wˌɛn taɪtˈeɪniəm hˈaɪdɹaɪdz wɪð lˈɛs ðɐn wˈʌn.θɹˈiː pɚsˈɛnt hˈaɪdɹədʒən, nˈoʊn æz hˌaɪpoʊjˈuːɾɪktˌɔɪd taɪtˈeɪniəm hˈaɪdɹaɪd ɑːɹ kˈuːld, ðə bˈeɪɾətaɪtˈeɪniəm fˈeɪz ʌvðə mˈɪkstʃɚɹ ɐtˈɛmpts tə ɹᵻvˈɜːt tə ðɪ ˈælfətaɪtˈeɪniəm fˈeɪz, ɹɪzˈʌltɪŋ ɪn ɐn ɛksˈɛs ʌv hˈaɪdɹədʒən.
When titanium hydrides with less than 1.3% hydrogen, known as hypoeutectoid titanium hydride are cooled, the β-titanium phase of the mixture attempts to revert to the α-titanium phase, resulting in an excess of hydrogen.