Odoo-Build/snippets/mint_system.purchase.report_purchasequotation_document.replace_title.xml

<data priority="50">
    <xpath expr="//div[@t-field='o.name']/.." position="replace">

<div class="mt-4">
                <h2 t-if="o.state in ['draft', 'sent', 'to approve']">Request for Quotation <span t-field="o.name"/></h2>
                <h2 t-if="o.state in ['purchase', 'done']">Purchase Order <span t-field="o.name"/></h2>
                <h2 t-if="o.state == 'cancel'">Cancelled Purchase Order <span t-field="o.name"/></h2>
            </div>

    </xpath>
</data>