Tex. Prop. Code § 5.023
(a) Unless the conveyance expressly provides otherwise, the use of "grant" or "convey" in a conveyance of an estate of inheritance or fee simple implies only that the grantor and the grantor's heirs covenant to the grantee and the grantee's heirs or assigns:
Acts 1983, 68th Leg., p. 3482, ch. 576, Sec. 1, eff. Jan. 1, 1984.